Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Eyepieces

Pages: 1 | 2 | 3 | (show all)
ArtVandelay
member


Reged: 05/19/13

Loc: Detroit MI, and Phoenix AZ
Explore Scientific 9mm 100 degree question
      #6038296 - 08/21/13 12:44 PM

I received my new ES 100 degree 9mm EP today. This is my first real EP addition to my Orion Skyview 8 Pro set up. I put it in the scope and looked at some trees in the distance. There was not much else to look at during the day. I was unable to focus on them as the draw tube hit its outer limit. Now I know that for terrestrial use a lot of larger EP's need a tube extender. I just wanted a quick glance through the EP that costs almost as much as my OTA. So my big question is will I need an extender for normal deep sky viewing? I have about 8 hours left until night, and want to order one today if I will end up needing one. I just thought that I would ask the Experts. I am sure that someone here uses this EP in the same Newt as I do. Thanks!

Post Extras: Print Post   Remind Me!   Notify Moderator  
McUH
member


Reged: 05/29/13

Re: Explore Scientific 9mm 100 degree question new [Re: ArtVandelay]
      #6038362 - 08/21/13 01:27 PM

I'm no expert but it probably depends on how far the trees are. If they are really distant and you can't focus on them, then you most likely won't be able to focus to infinity at night too.

Post Extras: Print Post   Remind Me!   Notify Moderator  
SteveG
Post Laureate
*****

Reged: 09/27/06

Loc: Seattle, WA
Re: Explore Scientific 9mm 100 degree question new [Re: McUH]
      #6038381 - 08/21/13 01:40 PM

Try pulling the eyepiece out of the focuser a little bit, then be sure to clamp it down tightly. At night, you're going to enjoy that 100 deg eyepiece. I would have recommended the 14 first, but the 9 should be great.

Post Extras: Print Post   Remind Me!   Notify Moderator  
csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Explore Scientific 9mm 100 degree question new [Re: SteveG]
      #6038412 - 08/21/13 02:00 PM

My nine still isn't in yet. +1on the 14mm. Still trying out the 20, but so far, it's a great one too.

Post Extras: Print Post   Remind Me!   Notify Moderator  
ArtVandelay
member


Reged: 05/19/13

Loc: Detroit MI, and Phoenix AZ
Re: Explore Scientific 9mm 100 degree question new [Re: csrlice12]
      #6038433 - 08/21/13 02:12 PM

The 14 is back ordered. As soon as they have more in stock they will send it.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: ArtVandelay]
      #6038459 - 08/21/13 02:32 PM Attachment (32 downloads)

I had to do the same with my 9mm and 14mm ES 100's. In my 10" scope, they won't come to focus unless I pull them out of the focuser about a good 1/2".

For both eyepieces, I added O-Rings so they can now reach focus. I also had to add 2 empty 2 inch filter cells to my 9mm ES 100, so that the barrel is longer and sits better in the focuser. I would have used a 14mm Baader fine tuning ring, but the one I have is too long at 28mm, so the 2" empty filter cells sufficed.

See attachments. I hope this helps!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6038463 - 08/21/13 02:34 PM Attachment (28 downloads)

..

Post Extras: Print Post   Remind Me!   Notify Moderator  
Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Explore Scientific 9mm 100 degree question new [Re: ArtVandelay]
      #6038474 - 08/21/13 02:39 PM

Quote:

Try pulling the eyepiece out of the focuser a little bit...



Yes, even if you have to hold it in your hand while doing-- just to make double-dog certain it is truly OUT focus you are needing! If it turns out to be *IN* focus you're short on, then you have a whole new problem...

As an alternative thot, assuming you *do* need a 2" extension, perhaps a good 2" Barlow having the lens cell removable (threaded-on) might come in handy?.... so the Barlow's tube can be used, sans-optics, as the "extension".


Post Extras: Print Post   Remind Me!   Notify Moderator  
MingoT
member


Reged: 09/12/10

Loc: Zaragoza, Spain
Re: Explore Scientific 9mm 100 degree question new [Re: ArtVandelay]
      #6038542 - 08/21/13 03:12 PM

On my orion xt12i, moving down the primary mirror with the colimation screws was just enough to achieve focus on the stars.
Cheers,
Mingo


Post Extras: Print Post   Remind Me!   Notify Moderator  
Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Explore Scientific 9mm 100 degree question new [Re: Mike B]
      #6038636 - 08/21/13 03:59 PM

Quote:

Quote:

Try pulling the eyepiece out of the focuser a little bit...



Yes, even if you have to hold it in your hand while doing-- just to make double-dog certain it is truly OUT focus you are needing! If it turns out to be *IN* focus you're short on, then you have a whole new problem...

As an alternative thot, assuming you *do* need a 2" extension, perhaps a good 2" Barlow having the lens cell removable (threaded-on) might come in handy?.... so the Barlow's tube can be used, sans-optics, as the "extension".




That's called "killing two birds with one stone". You get a good barlow to use AND an extension tube.
However, any extension tube will pull a 2" eyepiece back by the FULL length of the barrel. You may not want to pull an eyepiece back 2" or more, because now you'll have to move your focuser in a similar amount to achieve focus, and running out of in-travel is a harder-to-fix problem.
I would first try adding barrel extenders to the eyepieces because they would allow you to pull the eyepiece back, say, 1/2" and still be secure in the focuser.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Explore Scientific 9mm 100 degree question new [Re: Starman1]
      #6038670 - 08/21/13 04:17 PM

Yeah, like Markus' solution depicted a few posts above!

I have such a thread-on extender, and it works quite well. Don, do you have a collection of these at your shop?


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6038873 - 08/21/13 06:13 PM

Quote:



For both eyepieces, I added O-Rings so they can now reach focus. I also had to add 2 empty 2 inch filter cells to my 9mm ES 100, so that the barrel is longer and sits better in the focuser. I would have used a 14mm Baader fine tuning ring, but the one I have is too long at 28mm, so the 2" empty filter cells sufficed.

See attachments. I hope this helps!




Hum, the margin of safety seems greatly reduced, is it not ?


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6038931 - 08/21/13 06:44 PM Attachment (13 downloads)

How so?

Both barrels have plenty of space on them and I use compression rings on my 2" focuser. Hardly a "margin of safety". Good part about them also is that they won't "hang up" in the focuser on the tapered part...mine are no longer tapered and I am very careful when I use my eyepieces and ALWAYS clamp those suckers down with the compression ring on the focuser.

Not clamping them down in the compression ring is just asking for trouble !!!

The margin of safety is only reduced if you are careless!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6039124 - 08/21/13 08:41 PM

Quote:

The margin of safety is only reduced if you are careless!



Say- aren't you the bloke with the flying 9mm howitzer eyepiece?


Post Extras: Print Post   Remind Me!   Notify Moderator  
Rick Woods
Postmaster
*****

Reged: 01/27/05

Loc: Inner Solar System
Re: Explore Scientific 9mm 100 degree question new [Re: Mike B]
      #6039169 - 08/21/13 09:09 PM

Quote:

Quote:

Try pulling the eyepiece out of the focuser a little bit...



Yes, even if you have to hold it in your hand while doing-- just to make double-dog certain it is truly OUT focus you are needing! If it turns out to be *IN* focus you're short on, then you have a whole new problem...

As an alternative thot, assuming you *do* need a 2" extension, perhaps a good 2" Barlow having the lens cell removable (threaded-on) might come in handy?.... so the Barlow's tube can be used, sans-optics, as the "extension".





Another thought is to cut a ring of 2" ID (inside diameter) PVC pipe, slip it over the barrel, and use that for your spacer. I made a few of these so my 40mm Wide Field, 20mm Nagler (T2), and 14mm Meade UWA would be parfocal. I stopped using them when I started using a big SCT, but they worked well for a long time.


Post Extras: Print Post   Remind Me!   Notify Moderator  
ArtVandelay
member


Reged: 05/19/13

Loc: Detroit MI, and Phoenix AZ
Re: Explore Scientific 9mm 100 degree question new [Re: Rick Woods]
      #6039249 - 08/21/13 10:03 PM

Well, it got dark enough to go outside and give it a try. Looks like pulling out the EP about 1/3 of an inch brought everything into focus. I plan to get an extension tube now. It didn't even occur to me when ordering that I may need one. The one from Orion just has two set screws. Does anyone know what the cheapest option is that uses a compression ring? I am headed out on a 12 hour drive to the middle of know where upper peninsula Michigan with dark skies on Sunday. I know that anything I order will not get here by then unless I pay twice the value in shipping. I checked Amazon and they don't have anything available on Prime shipping that would get to me Friday. So I guess for now I will use the pull out method while up there!

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: Mike B]
      #6039294 - 08/21/13 10:25 PM

Quote:

Quote:

The margin of safety is only reduced if you are careless!



Say- aren't you the bloke with the flying 9mm howitzer eyepiece?






He knows it better than anyone.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6039320 - 08/21/13 10:58 PM

Quote:

Say- aren't you the bloke with the flying 9mm howitzer eyepiece?




Actually, it was a 14mm ES 100 that went flying out of a telescope. I lent it out and it was put into a refractor. The person who borrowed it didn't tighten the eyepiece in the diagonal and didn't tighten each axis of his scope. This resulted in the objective end of the scope to tip downwards and the eyepiece upwards launching it in the air and to the ground below.

Nothing could have saved the eyepiece except for clamping everything down....So, it doesn't matter how deep or shallow the eyepiece was sitting in the diagonal.

Quote:

Hum, the margin of safety seems greatly reduced, is it not ?




The above quote does not apply here at all.


Post Extras: Print Post   Remind Me!   Notify Moderator  
kkokkolisModerator
Carpal Tunnel
*****

Reged: 09/23/09

Loc: Piraeus, Greece
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6039687 - 08/22/13 07:57 AM

I use a Baader HYPERION FINETUNING STOP RING 2", this one, with or without fine tune rings, but not for ES100s, usually for Nagler T4 12mm that can't focus as 2" on certain telescopes.
I like the O ring solution. Usually my 50mm O Rings (from 50mm finders) are lost, so I'm always short of them. Markus has many!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6039763 - 08/22/13 09:12 AM

Quote:



Quote:

Hum, the margin of safety seems greatly reduced, is it not ?




The above quote does not apply here at all.




I can delete my post if you want.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6039925 - 08/22/13 11:10 AM

Nah, it's ok, it's all good No harm was intended by you.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6039931 - 08/22/13 11:12 AM

No problem Markus. Hey, I have exactly the ES setup as you.

30mm ES 82°, 14mm ES 100°, 9mm ES 100°


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6039984 - 08/22/13 11:41 AM

Nice! Aren't you also a collector of vintage eyepieces too?

Cheers,


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6040032 - 08/22/13 12:23 PM

Quote:

Nice! Aren't you also a collector of vintage eyepieces too?

Cheers,




Just slightly. I have among other a Nagler 11mm T1 and the smoothies NJ Televue widefield series. I have about 30 eyepieces, recent and vintage. Do you have some ?


Post Extras: Print Post   Remind Me!   Notify Moderator  
csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6040086 - 08/22/13 12:56 PM

If you ever bought a used eyepiece, chances are Marcus had it at one point or another.....

Marcus is like the King of Eyepiece Swappers......

and we all owe him a thanks for that.........

he'd done some pretty decent reviews of various eyepieces written more on a laymen's terms then a lot of techie stuff.


Post Extras: Print Post   Remind Me!   Notify Moderator  
SteveG
Post Laureate
*****

Reged: 09/27/06

Loc: Seattle, WA
Re: Explore Scientific 9mm 100 degree question new [Re: csrlice12]
      #6040418 - 08/22/13 04:19 PM

Scopestuff has the barrel extensions:
http://www.scopestuff.com/ss_epe2.htm


Post Extras: Print Post   Remind Me!   Notify Moderator  
Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Explore Scientific 9mm 100 degree question new [Re: SteveG]
      #6040470 - 08/22/13 05:05 PM

Some examples of barrel extensions:
Baader Fine Tuning Ring--14mm
Baader Fine Tuning Ring--28mm
TeleVue Barrel extender--30.4mm
2" filters with glass removed--average 5mm
And, of course, they could be combined......


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Starman1]
      #6040554 - 08/22/13 06:00 PM

Quote:

Just slightly. I have among other a Nagler 11mm T1 and the smoothies NJ Televue widefield series. I have about 30 eyepieces, recent and vintage. Do you have some ?




Hi Pollux556,

Unfortunately I do not have any vintage eyepieces. Like Randy said, I swap them out a lot to try others. If I had of saved every eyepiece I have bought, I would have hundreds! I just have four right now.

As for vintage eyepieces, or older offerings, I have owned a 16mm flat top Konig, a 2" 32mm Edmund Erfle, a 32mm Konig, a few Criterion eyepieces, maybe a few more. Wish I had of kept them also!

I think Bill Rose AFAIK, is the king of the eyepiece collectors, I'm prob the king of buying and selling, LOL!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: csrlice12]
      #6041367 - 08/23/13 08:03 AM

Quote:

If you ever bought a used eyepiece, chances are Marcus had it at one point or another.....

Marcus is like the King of Eyepiece Swappers......

and we all owe him a thanks for that.........

he'd done some pretty decent reviews of various eyepieces written more on a laymen's terms then a lot of techie stuff.




I believe, with the number of posts he has.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6041401 - 08/23/13 08:26 AM

Quote:

Quote:

Just slightly. I have among other a Nagler 11mm T1 and the smoothies NJ Televue widefield series. I have about 30 eyepieces, recent and vintage. Do you have some ?




Hi Pollux556,

Unfortunately I do not have any vintage eyepieces. Like Randy said, I swap them out a lot to try others. If I had of saved every eyepiece I have bought, I would have hundreds! I just have four right now.

As for vintage eyepieces, or older offerings, I have owned a 16mm flat top Konig, a 2" 32mm Edmund Erfle, a 32mm Konig, a few Criterion eyepieces, maybe a few more. Wish I had of kept them also!

I think Bill Rose AFAIK, is the king of the eyepiece collectors, I'm prob the king of buying and selling, LOL!




I owned some EP like Orion Expanse, UO ortho ect. May be 100 EP have passed through my eye
I don't know Bill Rose. What is AFAIK ?


Post Extras: Print Post   Remind Me!   Notify Moderator  
csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6041436 - 08/23/13 08:49 AM

AFAIK, As Far As I Know.....(as far as I know).

Post Extras: Print Post   Remind Me!   Notify Moderator  
MrFancypants
member


Reged: 07/05/12

Loc: Swift Current, SK
Re: Explore Scientific 9mm 100 degree question new [Re: csrlice12]
      #6041470 - 08/23/13 09:16 AM

You are looking for one of these if you can't move your mirror enough:
http://www.telescope.com/Orion-Long-2-Adapter-for-Crayford-Type-Telescope-Foc...


Post Extras: Print Post   Remind Me!   Notify Moderator  
ArtVandelay
member


Reged: 05/19/13

Loc: Detroit MI, and Phoenix AZ
Re: Explore Scientific 9mm 100 degree question new [Re: MrFancypants]
      #6041847 - 08/23/13 12:59 PM

Quote:

You are looking for one of these if you can't move your mirror enough:
http://www.telescope.com/Orion-Long-2-Adapter-for-Crayford-Type-Telescope-Foc...




That piece came with my scope. I saw that and then looked at my focuser, and that is the exact piece that is currently on there. This is what I need http://www.telescope.com/2-Orion-Telescope-Eyepiece-Extension-Tube/p/5124.uts...
The only thing is that I would prefer it to have a compression ring. Televue makes one, but it is $60. I was curious if anyone knows of another company that makes one with a compression ring for cheaper.


Post Extras: Print Post   Remind Me!   Notify Moderator  
SteveG
Post Laureate
*****

Reged: 09/27/06

Loc: Seattle, WA
Re: Explore Scientific 9mm 100 degree question new [Re: ArtVandelay]
      #6041866 - 08/23/13 01:13 PM

Here's a bunch of barrel extensions by Blue Fireball:

http://agenaastro.com/parts-accessories/adapters/spacers.html


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: SteveG]
      #6041965 - 08/23/13 02:23 PM Attachment (6 downloads)

I think an extension tube maybe just what the doctor ordered!

Left pic: No extension tube. Right pic has a 35mm Blue Fireball extension tube added in the focuser. The 35mm Extension Tube has a compression ring, and it is only $25.95 If it is too long after you add the extension tube, all you will have to do to reach focus is rack the focuser inwards.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6041987 - 08/23/13 02:36 PM Attachment (8 downloads)

Here it is.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6042057 - 08/23/13 03:20 PM

The math works out bad for an extender tube as pictured:
Focuser maximum out--1.5"
Eyepiece Needs an extra 0.33" out
Extender tube adds about 2" (maybe a little more) in pullback (full length of 2" barrel on eyepiece since none of the eyepiece is now inside the focuser).
Now focuser needs to move in by 2" - 0.33" = 1.67"
The eyepiece will run out of in-travel.

In this situation, a barrel extender is a better choice, because the eyepiece can pull out the necessary 1/3" and still leave over 1.5" of the original eyepiece barrel in the focuser PLUS the length of the barrel extension.

A focuser extension tube is desirable when you need an inch or more of pull-back for the eyepiece.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: Starman1]
      #6042064 - 08/23/13 03:26 PM

Don,

I need to bring my eyepiece out about 1/2" with my 9mm or 14mm ES 100's to reach focus. I can reach focus with the O-rings in place or with the extension tube, (without the O-Rings), for either eyepiece, and I still have a lot of play inwards. I think the extension tube will work, unless I am mistaken because he needs 1/3" of out travel?


Post Extras: Print Post   Remind Me!   Notify Moderator  
csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6042072 - 08/23/13 03:31 PM

Haven't got the 9mm in yet, but have been able to reach focus with my 10XTi with the dual speed Scopestuff focuser with both the 14 & 20mm ES100.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 9mm 100 degree question new [Re: csrlice12]
      #6042132 - 08/23/13 04:08 PM

Quote:

AFAIK, As Far As I Know.....(as far as I know).




Thanks !


Post Extras: Print Post   Remind Me!   Notify Moderator  
Starman81
Carpal Tunnel
*****

Reged: 03/06/08

Loc: Metro Detroit, MI, USA
Re: Explore Scientific 9mm 100 degree question new [Re: SteveG]
      #6042724 - 08/23/13 11:56 PM Attachment (5 downloads)

Quote:

Here's a bunch of barrel extensions by Blue Fireball:

http://agenaastro.com/parts-accessories/adapters/spacers.html




I used to use my GSO 2" Barlow without the barlow element as my 'extension tube' when I had the ES100 9mm. It worked well, but what a moment arm!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Explore Scientific 9mm 100 degree question new [Re: Starman81]
      #6042818 - 08/24/13 01:18 AM

Ya- you don't wanna whack into that in the dark... unless you were wanting a focuser upgrade.

Post Extras: Print Post   Remind Me!   Notify Moderator  
bherv
Carpal Tunnel
*****

Reged: 03/10/06

Loc: WMass
Re: Explore Scientific 9mm 100 degree question new [Re: Mike B]
      #6043426 - 08/24/13 11:39 AM Attachment (5 downloads)

I recently changed out the stock focuser on my 5" f/5 Skywatcher and replaced it with a 2 speed Crayford. I found I needed to pull my ES eyepieces about 1/4" out of focuser to reach focus. I then tried to use a 2" extension tube but I did not have enough in focus. I was about to buy a shorter extension tube when I realized I had a non-tunable Paracorr top sitting on my dresser. It adds about 1.5" to the racked out height so I should have enough in focus with my ES eyepieces. I put a piece of clear packing tape on inside of Paracorr barrel to protect eyepiece from getting scratched by the set screw
Barry


Post Extras: Print Post   Remind Me!   Notify Moderator  
kkokkolisModerator
Carpal Tunnel
*****

Reged: 09/23/09

Loc: Piraeus, Greece
Re: Explore Scientific 9mm 100 degree question new [Re: Pollux556]
      #6043445 - 08/24/13 11:54 AM

Markus, do you use the original Skywatcher 2" adapter, the one that the scope was sold with?

Post Extras: Print Post   Remind Me!   Notify Moderator  
ArtVandelay
member


Reged: 05/19/13

Loc: Detroit MI, and Phoenix AZ
Re: Explore Scientific 9mm 100 degree question new [Re: kkokkolis]
      #6043475 - 08/24/13 12:07 PM

Yep. This is exactly what I needed. Thanks Scanning4Comets!

http://agenaastro.com/blue-fireball-2-eyepiece-extension-tube-35mm-1-38-exten...

Edited by ArtVandelay (08/24/13 03:45 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Explore Scientific 9mm 100 degree question new [Re: ArtVandelay]
      #6043909 - 08/24/13 04:45 PM

Quote:

Markus, do you use the original Skywatcher 2" adapter, the one that the scope was sold with?

--------------------
Konstantinos




Hi kkokkolis,

No, I don't use that adapter. I completely replaced the stock focuser with a Zhumell crayford focuser and then I ordered the dual-speed crayford focuser upgrade kit . The crayford focuser is so much better and the dual speed focuser upgrade kit is a blessing in disguise. When you use the dual speed part, the jiggles I had when focusing before are cut down a lot. I don't need an extension tube for any of my eyepieces. If you go back to page one of this thread, you can see a pic of my focuser. I have a pic on the left of the focuser itself, and a pic to the right showing a 35mm Blue Fireball extension tube which I use to mount my filters to so I don't have to screw my 2" filters onto any of my eyepieces. I just did the double picture to show what it looks like having a 35mm extension tube on the focuser.

I have a 2" Orion Ultrablock and a 2" 13% Neutral Density filter. I plan on getting a 25% ND filter and another Celestron O-III.

Quote:

Yep. This is exactly what I needed. Thanks Scanning4Comets!

http://agenaastro.com/blue-fireball-2-eyepiece-extension-tube-35mm-1-38-exten...




Glad I could be of some help!

Post Extras: Print Post   Remind Me!   Notify Moderator  
JackeShan
sage


Reged: 06/19/10

Loc: Sweden, Dalarna.
Re: Explore Scientific 9mm 100 degree question new [Re: Scanning4Comets]
      #6094009 - 09/21/13 07:34 PM

Quote:

I had to do the same with my 9mm and 14mm ES 100's. In my 10" scope, they won't come to focus unless I pull them out of the focuser about a good 1/2".





Did you ever try the 20mm ES100 in the stock focuser for your Skywatcher? I was very surprised when I could reach focus just as easy as my other eyepieces, without the need to pull the eyepiece out at all to reach focus.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | (show all)


Extra information
36 registered and 27 anonymous users are browsing this forum.

Moderator:  ausastronomer, droid, cbwerner, kkokkolis 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 1375

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics