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Equipment Discussions >> Eyepieces

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Paul Schroeder
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Reged: 06/05/03

ES 100 caps leaving smudges - impacting reviews?
      #5937067 - 06/23/13 08:29 PM

I recently took delivery on a used 20mm Explore Scientific 100 eyepiece. Based on the comments in one of the threads here on CN, I checked to see if the soft cap on the bottom of the eyepiece was in contact with the field lens. Sure enough it had been, and had left a fairly good-sized smudge.

It didn't take too much to clean this off. At the same time, it made me wonder both how prevalent this might be, and whether it could impact some of the reviews people have offered of this eyepiece, or other ES eyepieces.

I tend to be on the fastidious side with astro equipment, yet at the same time when I purchase used eyepieces it doesn't usually occur to me to check the field lens to see if it's clean. I'll usually check the eye lens. Maybe others check both?

On this ES 20 the smudges were concentrated in the center of the field lens, and they were fairly significant. I didn't think to try using it prior to cleaning, but I'd have to imagine this could have a noticeable impact on the image quality, particularly in the center of the field.

I haven't used the ES20 enough to finalize my opinion, but so far my take is that it's a very sharp eyepiece, certainly so on axis. I just wonder if leaving smudges is commonplace, and whether those who've tested the eyepiece (or other 2" ES eyepieces) have checked for this issue.

It's a problem that ES needs to address and it probably impacts the quality of the views, but it's much more fixable than a flaw in the design or manufacturing. I've since gone to a bottom cap left over from a Tele Vue 2" eyepiece, and haven't had any new issues with smudges.

Paul


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DHurst
super member


Reged: 03/10/06

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Paul Schroeder]
      #5937082 - 06/23/13 08:41 PM

my bottom cap is so loose it falls off every time I pick the ep up from the case. I will be replacing it because it causes smudges also.

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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5937138 - 06/23/13 09:12 PM

I've replaced most of mine with televue caps as the ES ones kept falling off.

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bherv
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Reged: 03/10/06

Loc: WMass
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Paul Schroeder]
      #5937141 - 06/23/13 09:13 PM

I haven't had a problem with smudges. I store my ES eyepieces horizontaly in my eyepiece case.
Barry


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Rick Woods
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Reged: 01/27/05

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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: bherv]
      #5937147 - 06/23/13 09:17 PM

Mine came with a squishy rubber cap that leaves the smudge, but doesn't fall off. The problem is the field lens is too close to the end of the barrel. I just swapped the cap with a regular plastic one from a 2" diagonal barrel.
I believe the problem is pretty common; I'd think ES would change the caps once word gets out about it.


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Jarrod
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Rick Woods]
      #5937409 - 06/24/13 02:12 AM

Quote:


I believe the problem is pretty common; I'd think ES would change the caps once word gets out about it.




They already have. My new 9mm ES100 (Argon purged, new box design) came with a rigid cap. It fits pretty loose though, so there is that to contend with.


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johnnyha
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Reged: 11/12/06

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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Jarrod]
      #5937429 - 06/24/13 02:41 AM

Clearly, the Eyepiece Caps Division at Explore Scientific needs new leadership.

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Scanning4Comets
Markus
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Reged: 12/26/04

Loc: Ontario, Canada
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: johnnyha]
      #5937517 - 06/24/13 06:28 AM

I was sent three hard field lens caps from Russ at ES. He's an excellent guy and as soon as he had read about it happening to me, I was sent three hard plastic caps free of charge. I no longer get smudges on the bottom caps of my ES 100 degree eyepieces !!!

Cheers,


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ibase
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #5937633 - 06/24/13 09:02 AM

That's great customer service from ES, kudos are in order at this instance.

Best,


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star drop
contra contrail
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Reged: 02/02/08

Loc: Snow Plop, WNY
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: ibase]
      #5937674 - 06/24/13 09:41 AM

It is a nuisance cleaning the smudges. They seem to reappear after a few days.

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csrlice12
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Loc: Denver, CO
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: star drop]
      #5937762 - 06/24/13 10:44 AM

It's ok, after rubbing the bottom lens enough, it'll polish that lens coating down real smooth like

After spending that much for the lens, get a harder Televue cup, especially the 2" ones. They run like $2, and it's worth it to protect the investment. My new ES100* 14mm cap fits, but it's flimsey, so I'll use it to cover a diagonal when I'm not using it....


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Ashfall
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Reged: 05/28/12

Loc: Pearland, Texas
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #5938173 - 06/24/13 02:51 PM

I have six ES 2" eyepieces. Here is a list of the field lens caps that came with each. The only rigid one is the 25mm, and it's also the only one that falls off every time. I should probably replace all of these with Televue caps as recommended above.

68° 40mm soft cap, never smudges, rarely falls off
82° 30mm soft cap, easily smudges, rarely falls off
100° 25mm rigid cap, never smudges, always falls off
100° 20mm soft cap, sometimes smudges, rarely falls off
100° 14mm soft cap, sometimes smudges, rarely falls off
100° 9mm soft cap, rarely smudges, rarely falls off


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Ralph Steudtner
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Reged: 07/13/12

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #5938193 - 06/24/13 03:06 PM

I also contacted ES customer service regarding the soft rubber caps on my 3 2" ES eyepieces as I was experiencing this smudging as well. I was told that they are replacing the soft rubber caps with hard plastic caps on their new 2" eyepieces. They also sent me 3 new hard plastic caps to replace the soft rubber ones I had. Received the new caps in 1 week and they work great. Excellent customer service! Thanks ES.

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DHurst
super member


Reged: 03/10/06

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Ralph Steudtner]
      #5938285 - 06/24/13 04:06 PM

I just called ES about the cap and they instantly took care of it. They will be shipping the new caps free of charge. Awesome customer service! You guys should give them a call!

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Scanning4Comets
Markus
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Reged: 12/26/04

Loc: Ontario, Canada
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5938425 - 06/24/13 05:35 PM

IMO, ES rocks !!!! I have had nothing but excellent service from the guys at ES.

Cheers,


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GOLGO13
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Reged: 11/05/05

Loc: St. Louis area
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #5938700 - 06/24/13 08:55 PM

I believe the cap on my 14mm is fine. No smudges yet and it seems pretty normal to me. Maybe mine was one of the newer ones which have it fixed.

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star drop
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Reged: 02/02/08

Loc: Snow Plop, WNY
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: GOLGO13]
      #5938818 - 06/24/13 10:21 PM

Excellent service for me as well using the live chat feature on their website.

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russell23
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: star drop]
      #5939293 - 06/25/13 08:29 AM

I put a vernonscope 2" cap on the bottom of my 14mm ES100 and had no problems with it falling off or with smudges after that.

Dave


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Paul Schroeder
sage
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Reged: 06/05/03

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: russell23]
      #5939381 - 06/25/13 09:36 AM

Quote:

I put a vernonscope 2" cap on the bottom of my 14mm ES100 and had no problems with it falling off or with smudges after that.

Dave




I'm curious - for those of you who've noticed this smudge and then cleaned the eyepiece, have you done a "before and after cleaning" observing comparison? If so, did the smudge have a noticeable impact on image quality?

Thanks!

Paul


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star drop
contra contrail
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Reged: 02/02/08

Loc: Snow Plop, WNY
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Paul Schroeder]
      #5939600 - 06/25/13 11:58 AM

It does impact the views when the smudge is large but it is not a severe issue. Plastic degradation over the long term might become a problem though.

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Tamiji Homma
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Paul Schroeder]
      #5939625 - 06/25/13 12:08 PM

Hi Paul,

It did have big impact to image. Here is an example (ES 30mm):


I cleaned it with Baader Optical Wonder and then distilled water. It is gone.

Tammy


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Tamiji Homma]
      #5939635 - 06/25/13 12:16 PM

"I cleaned it with Baader Optical Wonder and then distilled water. It is gone."

and hopefully, so's that eyepiece cup.


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Matt Wallin
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Reged: 01/29/12

Loc: Portland, OR
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #5940002 - 06/25/13 03:27 PM

My ES82 30mm got badly smudged by the bottom cap one time and I was so disappointed with it's views, it really affects the view, big time. I was comparing it to my ES100 20mm on M31, the contrast was so bad in comparison that I almost considered selling it until I noticed the nasty smear on the field lens!

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Paul Schroeder
sage
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Reged: 06/05/03

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Matt Wallin]
      #5940185 - 06/25/13 05:30 PM

Quote:

My ES82 30mm got badly smudged by the bottom cap one time and I was so disappointed with it's views, it really affects the view, big time. I was comparing it to my ES100 20mm on M31, the contrast was so bad in comparison that I almost considered selling it until I noticed the nasty smear on the field lens!




Thanks all for the feedback, it's very helpful!

Previously I had an ES 30mm 82 degree that I compared to a Nagler 31T5, and I didn't think the ES was that close across the entire field of view.

However, I also don't remember checking whether the field lens had a smudge.

I might just have to re-try the comparison with the 31T5 -

Paul


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Fred1
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Reged: 09/19/07

Loc: Somewhere in the Orion Spur
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Paul Schroeder]
      #5940259 - 06/25/13 06:34 PM

I posted this in another thread but I don't mind repeating myself. I solved the problem with a Kim Wipe stuffed into the cap (best tissues for cleaning, BTW, no lint, no smear) and the barrel glass stays 100% smudge free, even though I use the soft yellow Eyepiece Caps on all my EPs as they stay pliable in winter and easy to find when dropped in the dark.

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DHurst
super member


Reged: 03/10/06

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Fred1]
      #5942513 - 06/27/13 04:14 AM

Quote:

I solved the problem with a Kim Wipe stuffed into the cap




Forgive me... but that's not a solution! Sounds like a way to cause more problems! The bottom cap should protect the field lens! Bottom line!

Be careful, the lens is very close to the bottom of the ES20 barrel!

Just give them a call if you have an issue.
I feel assured ES has and will respond appropriately!


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vonuscyg
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Reged: 03/21/11

Loc: Southern CA
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5942582 - 06/27/13 06:42 AM

I have the same smudging problem with my 20mm 100* ES eyepiece. I cleaned it off, and under normal house lighting, it looked sparkling clean.
However, when I was observing at my dark sky location, I was able to see a faint smudge on the field lens under the subdued light of my red flashlight. It appears that the lens cap may have left a permanent, but ghostly stain.
I doubt it affects the views though.


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slack
sage
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Reged: 05/02/12

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5943370 - 06/27/13 04:17 PM

Quote:

Quote:

I solved the problem with a Kim Wipe stuffed into the cap




Forgive me... but that's not a solution! Sounds like a way to cause more problems! The bottom cap should protect the field lens! Bottom line!

Be careful, the lens is very close to the bottom of the ES20 barrel!




It may not be a solution, but it's less likely to cause more problems than a replacement non-smudging bottom plastic cap that is in still in contact with the field lens. After all, KimWipes are widely used by professionals to clean the finest and costliest optics.


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: slack]
      #5943378 - 06/27/13 04:24 PM

A hard cap like the ones from Televue don't flex, so they won't touch the field lens. I think I paid $2 for mine.

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Matt Wallin
member
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Reged: 01/29/12

Loc: Portland, OR
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: slack]
      #5943444 - 06/27/13 05:07 PM

The field lenses arent' right *at* the bottom, it's just that the rubber cup flexes that much! A rigid cap would definitely fix the problem. IMHO, having ANYTHING, even a pro-grade cleaning cloth, in constant contact with my optics seems to just be asking for trouble, it may have worked for you so far, but why use a method with such potential for damage? One piece of grit, landing in the wrong place, vibrating against my field lens every mile of rough road I drive? No, thanks.

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Matt Wallin
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Reged: 01/29/12

Loc: Portland, OR
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Matt Wallin]
      #5943523 - 06/27/13 05:51 PM

Just put in a quick call to ES, they we eager to send me new bottom caps for my ES82 and ES100s, free of charge. Gotta love that, standing behind your products! Thanks ES!

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Fred1
Carpal Tunnel
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Reged: 09/19/07

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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: slack]
      #5943525 - 06/27/13 05:52 PM

Quote:

Quote:

Quote:

I solved the problem with a Kim Wipe stuffed into the cap




Forgive me... but that's not a solution! Sounds like a way to cause more problems! The bottom cap should protect the field lens! Bottom line!

Be careful, the lens is very close to the bottom of the ES20 barrel!




It may not be a solution, but it's less likely to cause more problems than a replacement non-smudging bottom plastic cap that is in still in contact with the field lens. After all, KimWipes are widely used by professionals to clean the finest and costliest optics.




That's right, Slack. Anyone that's ever used a Kim Wipe knows that. I do the same with my 17mm Ethos. Plus, those yellow EyepieceCaps are better than losing another black cap in the dark or wasting perfectly good observing time looking for one in the grass.


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Starman1
Vendor (EyepiecesEtc.com)
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Reged: 06/24/03

Loc: Los Angeles
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: vonuscyg]
      #5943664 - 06/27/13 07:19 PM

Quote:

I have the same smudging problem with my 20mm 100* ES eyepiece. I cleaned it off, and under normal house lighting, it looked sparkling clean.
However, when I was observing at my dark sky location, I was able to see a faint smudge on the field lens under the subdued light of my red flashlight. It appears that the lens cap may have left a permanent, but ghostly stain.
I doubt it affects the views though.



Try ROR (ror.net). It will safely clean the glass down to the coatings, leaving no stain behind.


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DHurst
super member


Reged: 03/10/06

Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Matt Wallin]
      #5944194 - 06/28/13 03:21 AM

Quote:

The field lenses arent' right *at* the bottom, it's just that the rubber cup flexes that much! A rigid cap would definitely fix the problem...




I measured 5mm from the bottom edge of the barrel to the center of the field lens. *at* is relative! I don't know about you, but to me half a centimeter is pretty tight! Just got my cap from ES today. It's no TV cap but way more rigid than the orig.


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Scanning4Comets
Markus
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Reged: 12/26/04

Loc: Ontario, Canada
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5944252 - 06/28/13 06:09 AM

I hate to say this, but people really need to stop complaining about this and just contact ES about it....they will send you any free bottom caps you need free of charge if you can prove you own any of the three focal lengths in the 100 degree series. It's a bottom cap and an easy fix if you think about it.

Heck, you could even order one from Agena Astro for next to nothing !!! C'mon people, it's not that big of a deal really. They know they made a mistake and are helping everybody out they can. The people that work at ES who have contacted me have been very polite and the customer service has been over the top for me personally!!!

Cheers,


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GeneT
Ely Kid
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Reged: 11/07/08

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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Paul Schroeder]
      #5945407 - 06/28/13 07:14 PM

Quote:

I checked to see if the soft cap on the bottom of the eyepiece was in contact with the field lens. Sure enough it had been, and had left a fairly good-sized smudge.




I hope this was just an anomaly. Anyone else have this problem?


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GeneT
Ely Kid
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Reged: 11/07/08

Loc: South Texas
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: GeneT]
      #5945416 - 06/28/13 07:18 PM

Quote:

Quote:

I checked to see if the soft cap on the bottom of the eyepiece was in contact with the field lens. Sure enough it had been, and had left a fairly good-sized smudge.




I hope this was just an anomaly. Anyone else have this problem?




I see where ES has changed the caps, and sent customers new ones at no charge. Case closed?


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russell23
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Loc: Upstate NY
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: GeneT]
      #5946185 - 06/29/13 09:23 AM

Quote:

Quote:

I checked to see if the soft cap on the bottom of the eyepiece was in contact with the field lens. Sure enough it had been, and had left a fairly good-sized smudge.




I hope this was just an anomaly. Anyone else have this problem?




Yes. When I picked up a used 14mm ES100 it came with a smudge just like the photo shown on this thread. It cleaned up and I switched to a hard cap and then there was no problem.

Dave


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vonuscyg
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Reged: 03/21/11

Loc: Southern CA
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: russell23]
      #5947224 - 06/29/13 09:46 PM Attachment (8 downloads)

I received a replacement lens cap from ES today, only two days after requesting it. That was quick.

The new, hard cap is on the left. It seems to fit even looser than the original soft cap, and it doesn't look as well made as the soft one. Hmmm, I might just keep using the original caps, being careful to place the eyepiece eye lens end first into the eyepiece case. I suspect in the cold of the observing nights, the caps would fall off even easier.

Thanks Don for the ROR advice.


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azure1961p
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: star drop]
      #5947281 - 06/29/13 10:45 PM

I don't ever use eyepiece caps ever. The ocular case when closed is dust proof and has desiccant to insure dryness. I'd never cap my oculars particularly where it could conceivably have air that's moist trapped under the cap even the the case is desiccant dry.

Pete


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Starman1
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: azure1961p]
      #5947286 - 06/29/13 10:50 PM

Quote:

I don't ever use eyepiece caps ever. The ocular case when closed is dust proof and has desiccant to insure dryness. I'd never cap my oculars particularly where it could conceivably have air that's moist trapped under the cap even the the case is desiccant dry.

Pete



All well and good unless the foam in your case hits the bottom and top lenses on your eyepieces.


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Scanning4Comets
Markus
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Loc: Ontario, Canada
Re: ES 100 caps leaving smudges - impacting reviews? new [Re: azure1961p]
      #5947305 - 06/29/13 11:09 PM

Quote:

I don't ever use eyepiece caps ever. The ocular case when closed is dust proof and has desiccant to insure dryness. I'd never cap my oculars particularly where it could conceivably have air that's moist trapped under the cap even the the case is desiccant dry.

Pete




I've been using eyepiece caps for years without any problems. I'd never put eyepieces in my case without putting caps on them ever. Dust is everywhere and can accumulate....especially on a cold eyepiece after an observing session and after it warms up.

Cheers,


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Jim7728
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #5948031 - 06/30/13 01:06 PM Attachment (5 downloads)

Quote:

I've replaced most of mine with televue caps as the ES ones kept falling off.




Same here. I think any eyepiece with a negative element on the bottom should be stored horizontally.


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gnowellsct
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Jim7728]
      #5952373 - 07/03/13 12:49 AM

I haven't used eyepiece caps in 7 or 8 years. I used to put each eyepiece into its own bolt case. When I got tired of that--I would spend 20 minutes sorting out eyepieces and bolt cases--I made an eyepiece box and just stick the eyepieces in the box. When it's closed up they're not getting any dust.

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gnowellsct
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Starman1]
      #5952376 - 07/03/13 12:51 AM

Quote:

Quote:

I don't ever use eyepiece caps ever. The ocular case when closed is dust proof and has desiccant to insure dryness. I'd never cap my oculars particularly where it could conceivably have air that's moist trapped under the cap even the the case is desiccant dry.

Pete



All well and good unless the foam in your case hits the bottom and top lenses on your eyepieces.




No, no foam. It's a gunk collector. My eyepieces are free range like God wants 'em to be. No caps, no foam.


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DHurst
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Jim7728]
      #5953036 - 07/03/13 12:27 PM

Quote:

Quote:

I've replaced most of mine with televue caps as the ES ones kept falling off.




Same here. I think any eyepiece with a negative element on the bottom should be stored horizontally.




Got to love the TV sticker next to an ES ep!


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5953206 - 07/03/13 02:11 PM

TeleScientific?

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Kutno
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: DHurst]
      #5953723 - 07/03/13 08:03 PM

Quote:

Got to love the TV sticker next to an ES ep!




True confessions.


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Rick Woods
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Kutno]
      #5978143 - 07/18/13 03:26 PM

I emailed ES and asked about replacement lens caps for my 3 ES100's. They sent them right out; unfortunately, these new ones fall off same as the old ones.
I appreciate that they sent free replacements, and I'm not going to ask them to do it again. I'll probably take Don P's advice and order some caps from OPT for $3 each. He says they fit right.

But my thanks to ES for acting so quickly - their intentions were good. They probably ought to find a new cap supplier, though.


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bherv
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Rick Woods]
      #5978180 - 07/18/13 03:47 PM

I rechecked my ES eyepieces and found that the 30 had a big smudge in the center of the lens. I cleaned it and took the hard plastic cap from my Barlow to replace the soft cap which I put on the Barlow.
Barry


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: bherv]
      #5978216 - 07/18/13 04:05 PM

I just bought the hard two sided Televue endcaps and replaced the original ones.....which brings up a good question, why do eyepiece caps cost so much, it's a cheap to make, easy to shape piece of rubber/plastic?????

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Starman1
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #5978226 - 07/18/13 04:11 PM

Try pricing the mold for a simple eyepiece cap. You would have to sell thousands before you would recoup your expenses.
And if the material is ozone-proof, stiff, and has your name molded in, increase the cost significantly.


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Starman1]
      #5978250 - 07/18/13 04:25 PM

and I imagine the design and specs for caps of all sorts have been known for a few hundreds of years. How many centuries does it take to get a "mold" or come up with a decent rubber formula? I understand times and materials change, but getting caps to fit....we should have that down by now.......

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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #5979097 - 07/19/13 02:08 AM

Quote:

I emailed ES and asked about replacement lens caps for my 3 ES100's. They sent them right out; unfortunately, these new ones fall off same as the old ones.
I appreciate that they sent free replacements, and I'm not going to ask them to do it again. I'll probably take Don P's advice and order some caps from OPT for $3 each. He says they fit right.

But my thanks to ES for acting so quickly - their intentions were good. They probably ought to find a new cap supplier, though.

--------------------
- Rick




Same here Rick. I got three replacements sent really quick, but when I tried any the caps on my ES 100's they just fell right off. They are stiff enough, but the fit was really loose for any of the three I had. I'm going to line the inside of all three with something thin for a better fit. I know I shouldn't have to do this, but I have three new caps here, and I may as well do something with them, lol.


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #5979490 - 07/19/13 09:57 AM

We could play frisbee with them till the sun goes down.....

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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #5979864 - 07/19/13 02:00 PM

I keep all my eyepieces capped to protect them from my sweaty fingers. I don't want any chance of my reaching into the equipment case at a dark site and getting fingerprints on the lenses.

Mike


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JackeShan
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Sarkikos]
      #6084127 - 09/16/13 03:07 PM

Just got an ES 100 20mm today, brand new and it also had a smudge on the lens from the cap. From now on I don't put on the cap completely, until I can get some stiffer caps.

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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: JackeShan]
      #6084135 - 09/16/13 03:12 PM

I just got a bunch of Televue caps from the scope shop @ $2 apiece. These are dual sided 2" caps. I just replaced the loose ones. Apparently, eyepiece cups are technologically impossible to make so that they stay on, yet remove easily......

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herrointment
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #6084399 - 09/16/13 05:43 PM

"My eyepieces are free range like God wants 'em to be."

Speaking of...where's the Buddha been lately?


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Shneor
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: herrointment]
      #6085208 - 09/17/13 02:10 AM

For the very few eyepiece caps I've had which were too loose, I just put some masking tape on the inside wall of the cap. Worked every time.

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kkokkolis
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #6085284 - 09/17/13 04:47 AM

Quote:

I just bought the hard two sided Televue endcaps and replaced the original ones




Where could I buy them from?


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: kkokkolis]
      #6085450 - 09/17/13 08:23 AM

I gottem at the scope store (brick & morter), but I imagine any of the online vendors sell them too....

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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: csrlice12]
      #6085534 - 09/17/13 09:15 AM

Recently I had one of these smudges on the objective of a 70mm finder I bought from Orion. At first I thought it was a defect in the coating. But then I thought about the end cap. Yes, the end cap was the soft rubbery kind, and wasn't far above the lens. The end cap was the culprit.

I tried removing the smudge with ROR and a lens tissue. Nope, no way. The smudge didn't budge.

Then I put a little saliva on my finger and gently passed it over the smudge. The smudge instantly disappeared! ROR was not strong enough to remove the rubbery smudge, but the enzymes in my saliva obviously were.

Of course, I quickly cleaned the entire lens with ROR and lens tissue. It's crystal clear!

Now I have to find a stiff substitute for the soft rubbery end cap. In the meantime I continue to use that end cap, but I'm very careful not to create another smudge.

Mike


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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Shneor]
      #6085541 - 09/17/13 09:17 AM

Quote:

For the very few eyepiece caps I've had which were too loose, I just put some masking tape on the inside wall of the cap. Worked every time.




I avoid masking tape or any kind of adhesive tape around eyepieces and lenses. If the tape comes loose, that adhesive could get on the lens. This is especially troublesome in dewy areas, such as my observing sites.

Mike


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Doug Culbertson
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Sarkikos]
      #6085583 - 09/17/13 09:40 AM

Quote:

Recently I had one of these smudges on the objective of a 70mm finder I bought from Orion. At first I thought it was a defect in the coating. But then I thought about the end cap. Yes, the end cap was the soft rubbery kind, and wasn't far above the lens. The end cap was the culprit.

I tried removing the smudge with ROR and a lens tissue. Nope, no way. The smudge didn't budge.

Then I put a little saliva on my finger and gently passed it over the smudge. The smudge instantly disappeared! ROR was not strong enough to remove the rubbery smudge, but the enzymes in my saliva obviously were.

Of course, I quickly cleaned the entire lens with ROR and lens tissue. It's crystal clear!

Now I have to find a stiff substitute for the soft rubbery end cap. In the meantime I continue to use that end cap, but I'm very careful not to create another smudge.

Mike




Mothers have always known the power of spit on a thumb for getting crud off. Centuries of motherhood can't be wrong, eh?


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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Doug Culbertson]
      #6085627 - 09/17/13 10:04 AM

It does make sense that natural enzymes would tend to dissolve organic substances. Are these end caps rubber or a rubber derivative, or an artificial material that is similar to organic substances? Doesn't really matter. Spit just works!

Mike


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Sarkikos]
      #6085636 - 09/17/13 10:11 AM

Quote:

It does make sense that natural enzymes would tend to dissolve organic substances. Are these end caps rubber or a rubber derivative, or an artificial material that is similar to organic substances? Doesn't really matter. Spit just works!

Mike




Just a little ES between my cheek and gum........they're spit proof you know.........


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csa/montana
Den Mama
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: kkokkolis]
      #6085650 - 09/17/13 10:16 AM

Quote:

Quote:

I just bought the hard two sided Televue endcaps and replaced the original ones




Where could I buy them from?




I believe that TeleVue themselves, sell replacement TV caps.


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SteveG
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Sarkikos]
      #6086388 - 09/17/13 05:06 PM

Quote:

Quote:

For the very few eyepiece caps I've had which were too loose, I just put some masking tape on the inside wall of the cap. Worked every time.




I avoid masking tape or any kind of adhesive tape around eyepieces and lenses. If the tape comes loose, that adhesive could get on the lens. This is especially troublesome in dewy areas, such as my observing sites.

Mike




This method works really well, and the tape does not come off the inside of the cap. I've done this to several caps over the years, never once getting any adhesive on anything.
I've used masking tape, black electrical tape, and even Scopestuff flocking paper - works really well!


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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: SteveG]
      #6086766 - 09/17/13 08:48 PM

Quote:

For the very few eyepiece caps I've had which were too loose, I just put some masking tape on the inside wall of the cap. Worked every time.

--------------------
Shneor




I've done this to the insides of some of my 2" caps for years....never had a problem.

Quote:

I avoid masking tape or any kind of adhesive tape around eyepieces and lenses. If the tape comes loose, that adhesive could get on the lens. This is especially troublesome in dewy areas, such as my observing sites.

Mike




I have four, 2" eyepiece caps I made myself using stiff cardboard and tape. I've never had any problems with the adhesive getting anywhere near anything. No adhesive has leaked out anywhere. I've had them for over 2 years without any problems. Great solution instead of buying them and looking all over the net for them, plus they are very stiff and never touch the field lens of my 14mm ES 100.


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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6087000 - 09/17/13 10:49 PM

Tape near lenses is a smudgy, sticky bomb waiting to explode.

Think about those broken nerd glasses held together by tape. Not attractive. Just barely effective.

Why do nerds put tape on their glasses?


Mike


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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Sarkikos]
      #6087087 - 09/17/13 11:34 PM

Not in the 2 years I have had those caps. I did mention I had them for over two years right? No issues at all.

So, you can come back here and post again convincing yourself they are of no use.


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Albie
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6087667 - 09/18/13 10:18 AM

Do you tape your glasses as well Markus?

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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Albie]
      #6087728 - 09/18/13 10:57 AM

Quote:

Do you tape your glasses as well Markus?




Yes, and I also tape people's mouths shut too. Just kidding, hahahahaha!


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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6087756 - 09/18/13 11:08 AM

Only the Moderators can do that here.

Mike


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Rinaldo
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6088912 - 09/18/13 09:18 PM

I don't know if it's been said yet because I haven't read all of the replies, but you can buy hard eyepiece caps from TeleView for two bucks a pop.

Also, I hear they improve the edge performance and reduce field curvature of your ES eyepieces, close to that of Televue!


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kkokkolis
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Rinaldo]
      #6091110 - 09/20/13 05:23 AM

Quote:

I don't know if it's been said yet because I haven't read all of the replies, but you can buy hard eyepiece caps from TeleView for two bucks a pop.

Also, I hear they improve the edge performance and reduce field curvature of your ES eyepieces, close to that of Televue!




The representative in Greece doesn't sell them.
I looked http://www.televue.com/engine/TV3b_page.asp?id=10 in TV's site and I don't see them.
I bought some 2" bottom caps from Scopestuff but they are soft. I prefer hard 2" TV caps and I'll need about a dozen. Can anyone provide a link to a selling page (hopign that they ship to Greece) please?


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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: kkokkolis]
      #6091130 - 09/20/13 06:15 AM

Quote:

Only the Moderators can do that here.

Mike




I wasn't talking about doing that here.


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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6091134 - 09/20/13 06:19 AM

Quote:

No, no foam. It's a gunk collector. My eyepieces are free range like God wants 'em to be. No caps, no foam.




Hi Greg,

What do you have for an eyepiece box? is it one of those that have the levels on them with 2" and 1.25" holes drilled out like Carol's and like the ones Jaimo makes?

It actually makes a lot of good sense having one of those! No caps.....just the lid to keep the dust out! That would make for an even faster set up & tear down.


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6091316 - 09/20/13 09:04 AM

Uh oh, Caps on No Caps......

I prefer caps, if that case ever accidentally gets knocked over.........of course, that won't help your scope shooting off ES100 14mm like morter shells like Markus found out.....


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Sarkikos
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6091476 - 09/20/13 10:33 AM

Quote:

Quote:

Only the Moderators can do that here.

Mike




I wasn't talking about doing that here.




You'll have to come to my dark site, then.

Mike


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Scanning4Comets
Markus
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Sarkikos]
      #6092426 - 09/20/13 08:18 PM

Quote:

You'll have to come to my dark site, then.

Mike




Imagine that! Some guy walking around in the dark mumbling expletives with tape over his mouth! That's right! it's a tape war!

LOL!


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csrlice12
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Re: ES 100 caps leaving smudges - impacting reviews? new [Re: Scanning4Comets]
      #6092575 - 09/20/13 10:08 PM

As long as its red tape......

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