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Equipment Discussions >> Eyepieces

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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.

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Pollux556
Pooh-Bah
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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°


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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,


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Pollux556
Pooh-Bah
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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 ?


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csrlice12
Postmaster
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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.


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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


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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......


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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!


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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.


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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 ?


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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).

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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...


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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.


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SteveG
Post Laureate
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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


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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.


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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.

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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.


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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?


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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.

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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 !


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