PitchHitter
member
Reged: 09/23/09
Posts: 23
Loc: Southern Sierras
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Yes the optical axis needs to be parallel to the altitudinal axis. As it is this scope cannot view a 12 degree circle straight overhead unless modified.  So DSCs are out.
I havent seen any specs or references, where might they be found?
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About 20 telescopes from a 200mmAPO up
Fav is Meade 10" f:4.5 using my 3" 40mm 96°AFOV
BUT! In Progress:
14.5" f:5 grab n' go with DSCs will offer 2.4 degrees at 45 power and 8mm exit pupil (Light Bridge Buster)
16.25" f:7.5 to refigure
(20th wave ruined in a fire at the coaters)
22" f5: New mount almost done
(old all aluminum mount was stolen)
16" Varian Vapor Deposition Coater.
Looking for larger chamber.
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PitchHitter
member
Reged: 09/23/09
Posts: 23
Loc: Southern Sierras
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Hmmm Still it would be nice to be able to look straight over head. My 14.25" Grab n Go will have DSC's on them because I can program comets and other moving objects in. I also can't claim to finding all 14 thousand objects from memory. That way when I go to a function I don't have to worry about some smartaleck kid asking to see some obscure object.
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About 20 telescopes from a 200mmAPO up
Fav is Meade 10" f:4.5 using my 3" 40mm 96°AFOV
BUT! In Progress:
14.5" f:5 grab n' go with DSCs will offer 2.4 degrees at 45 power and 8mm exit pupil (Light Bridge Buster)
16.25" f:7.5 to refigure
(20th wave ruined in a fire at the coaters)
22" f5: New mount almost done
(old all aluminum mount was stolen)
16" Varian Vapor Deposition Coater.
Looking for larger chamber.
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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i think you are not taking in to acount. The mirror is not being used onaxis the object being looked at is not where the mirror is aimed of not where the ladder is aimed //had a hard time when i first tried to find the moon /and wondered why it looked funny /i took out the eyepiece and looked i was looking through a tree / i think a dsc will work// but not sure // be nice to have DSC on the chief /
also not sure about the dob hole at the top of the sky being bigger in the chief / interesting/ I think the large CHief is where ED JONES invension has the greatest potential //there is a lot of way to go unobtructed 10in and smaller /20+ inches unobstructed easy if you have ED JONES AND MIKE JONES /fun telescope /
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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a neet idea ED uses on his window chief . is aim a green laser in the focuser it bounces off the two mirrors and up at the sky as a finder/ we donot have to have obstructed telescopes any more /i love newtonians and for the money and the views they canot be toped / the thing that got me excited was that how good the ofaxis can be and easy to make/ for very little money /two small bk7 lens / kevin
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Ed Jones
Pooh-Bah
Reged: 04/06/04
Posts: 1415
Loc: Sin-sin-atti
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Quote:
As it is this scope cannot view a 12 degree circle straight overhead unless modified.
That's only the way the way it was built. If it's really that important you can build it for a DSC. For me I have no blind spot since I always use it with an equatorial platform.
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Ed Jones
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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One thing this 20 INCH CHief does is DEEP SKY . When you think of offaxis you think of planets / Big unobstructed easy with EDS corrector/ KEVIN FREDERICK
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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going to be making a 6 inch f 10.75 CHief I have the primary. and have a idea on mounting the corrector different on this one . kevin
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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EDs says he could make a corrector to make the 48 inch f 10 that HERSCHEL made work. SO sounds like CHiefs are good to go to 50 inches . here is a pic of the finished 20 inch f 8 hand held camera.
Edited by kfrederick (10/28/09 11:21 AM)
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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a zygo same mirror
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 666
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Had the astronomyclub pres over to see the offaxis 20 it was working great .the new laser i got off howie helped .jupiter lookes great at 425 . i see if steve will post what he saw/
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