Pedestal
Post Laureate
Reged: 03/11/06
Posts: 3071
Loc: Smoggy Bottom, Baytown,Texas
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I want to add a 2" diagonal to my CPC9.25, primarily for DSLR work. I'm fairly confused on which way to go.
Astronomics has this one .
Astro Physics also has a "(ADASCT)" adapter, I assume you use a standard refractor diagonal with it. It looks pretty long in the pictures, though.
Could sure use some comments.
Hubert
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www.smoggybottom.org
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WNCAGC
sage
Reged: 06/25/08
Posts: 259
Loc: NC Mountains (God's country)
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I have this one and really like it...........
http://yhst-1469288697390.stores.yahoo.net/2didi99re.html
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CPC 1100 XLT "The Big Monster"
Power Tank 17
NexImager
2" Smart Astronomy 10:1 dual speed Crayford focuser
2" Smart Astronomy Dielectric diagonal
2" Smart Astronomy 2x Barlow
2" Baader SCOPOS 35 mm prototype EP
Baader Hyperion zoom EP 8-24mm
Celestron dew shield
Bob's Knobs
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Pedestal
Post Laureate
Reged: 03/11/06
Posts: 3071
Loc: Smoggy Bottom, Baytown,Texas
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What visual back are you using?
Hubert
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www.smoggybottom.org
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Rusty
Postmaster
Reged: 08/06/03
Posts: 16406
Loc: Brooker, FL
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I use the A-P (ADASCT) visual back with a "refractor" diagonal, or straight-throught for AP. It's not very thick, and it is robust. I'm curious as to why you would want to use a diagonal for photography.
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N11GPS Fastar
TOA-130S
MK66 Std
Vintage C5
Megrez II 80mm ED Triplet APO
SolarMax 40
NJP Temma II
Sirius EQ-G
ST8XE/CFW-8(LRGBHa)/AO-7/DF-2/STV Dlx/ST237a/350D (Unmodded)/Mallincam Color Hyper Plus/DSI III Color/DSI II Pro
Two not-spoiled Golden Retrievers - Maggie and Casey
Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering. - Arthur C. Clarke
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Pedestal
Post Laureate
Reged: 03/11/06
Posts: 3071
Loc: Smoggy Bottom, Baytown,Texas
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That's part of what I'm not sure of; it would seem running straight thru, you might have clearance problems near the zenith. Is that not so?
Hubert
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www.smoggybottom.org
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rboe
Numbfinger
Reged: 03/16/02
Posts: 39729
Loc: Phx, AZ
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I've used the rather long TeleVue 2" adaptor with a TV 2"diagonal and have plenty of room.
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Ron
NS11GPS
Pronto
16" dob
15X70 Obies
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WNCAGC
sage
Reged: 06/25/08
Posts: 259
Loc: NC Mountains (God's country)
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Quote:
What visual back are you using?
Hubert
I am using the SA 10:1 focuser that I put the diagonal into. Plenty of clearance.
Here is the link to the picture:
http://us.st12.yimg.com/us.st.yimg.com/I/yhst-1469288697390_2019_10789275
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CPC 1100 XLT "The Big Monster"
Power Tank 17
NexImager
2" Smart Astronomy 10:1 dual speed Crayford focuser
2" Smart Astronomy Dielectric diagonal
2" Smart Astronomy 2x Barlow
2" Baader SCOPOS 35 mm prototype EP
Baader Hyperion zoom EP 8-24mm
Celestron dew shield
Bob's Knobs
Edited by WNCAGC (09/04/08 04:46 PM)
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Bob D
super member
Reged: 05/24/08
Posts: 118
Loc: Dallas, Texas, USA
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I'm very satisfied with a 2" TV diagonal plugged into a JMI 2" focuser on my CPC 925.
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Bob
CPC 925 XLT
JMI EV-1c + Smart Focus
TV Everbrite 2" diagonal
TV 3x Barlow and a few eyepieces
Orion SSSSI-II
Canon 450D/XSi, D60, and many lenses
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Rusty
Postmaster
Reged: 08/06/03
Posts: 16406
Loc: Brooker, FL
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I use the CNCSupply 2" adaptor with a DSLR straight through; I haven't had the scope at zenith, but there seems to be plenty of clearance; the back of a DSLR would only be maybe 1/2" at most more than the 2" diagonal.
I did find the camera viewfinder awkward until I got the right angle attachment (which has the advantage that I can get VERY close to focuse with it).
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N11GPS Fastar
TOA-130S
MK66 Std
Vintage C5
Megrez II 80mm ED Triplet APO
SolarMax 40
NJP Temma II
Sirius EQ-G
ST8XE/CFW-8(LRGBHa)/AO-7/DF-2/STV Dlx/ST237a/350D (Unmodded)/Mallincam Color Hyper Plus/DSI III Color/DSI II Pro
Two not-spoiled Golden Retrievers - Maggie and Casey
Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering. - Arthur C. Clarke
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Pedestal
Post Laureate
Reged: 03/11/06
Posts: 3071
Loc: Smoggy Bottom, Baytown,Texas
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I believed you all the way down to: "Two not-spoiled Golden Retrievers - Maggie and Casey" 
Mind telling me what kind of camera you use? Is the RA veiwfinder camera specific?
Hubert
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www.smoggybottom.org
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Pedestal
Post Laureate
Reged: 03/11/06
Posts: 3071
Loc: Smoggy Bottom, Baytown,Texas
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Just a followup. I decided to go with the GSO dual speed focuser, purchased from Agena. It came in yesterday, so of course we have a hurricane threatening! No idea when I'll have the opportunity to test it out. It did fit on the back of the scope with no problems whatsoever.
Hubert
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www.smoggybottom.org
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