Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> Beginning Imaging Previous   Index   Next   Threaded   Pages: 1 Tim C member Reged: 11/11/07 Posts: 31 Loc: Marietta, GA Connecting my W.O. 66mm to a DSLR?       #2666671 - 09/27/08 06:10 PM Edit   Reply   Quote Quick Reply   Hi, I just found a good deal online for a Williams Optics 66m Zenithstar refractor and my birthday isn't too far away so I pulled the trigger. Was hoping someone could help me figure out how to connect this scope to my 450D for the best astrophotography performance. I'm 99% sure I'm going to order the .8X W.O. Reducer/Field Flattener for it. What kind of T adapter should I use? I'm a beginner but I've been using an 8"SCT thus far with a celestron SCT t-adapter. This adapter is about 3 inches long and has a diameter of 1.5 inches. Will this work with the WO 66 or should I buy a different t adapter (perhaps something shorter and/or with a wider diameter to reduce vignetting)? Thanks for any advice you have. Tim -------------------- Tim My Astrophotos: http://mediafire.com/tcardinastrophotos Nexstar 8SE Denkmeier Powerswitch Diagonal LXD75 Mount Williams Optics Zenithstar 66 Canon xsi/450D (unmodified) Various eyepieces and other stuff Edited by Tim C (09/27/08 06:11 PM) Post Extras:       Mobius1 sage Reged: 08/28/05 Posts: 472 Loc: Madison, WI / Gurnee, IL Re: Connecting my W.O. 66mm to a DSLR? [Re: Tim C]       #2666771 - 09/27/08 07:34 PM Edit   Reply   Quote Quick Reply   I know that the 66mm is a bit different from the larger scopes in the kind of visual back it has. But i believe that you can get an adapter with SCT threads on the rear, so that you could mate your T to SCT adapter on your '66. -------------------- Martin Orion 100ED Orion 120-ST EQ PST-Ha Celestron CGE 1100 Canon Rebel XSI DSI-IIC Yerkes Observatory Volunteer (24" Cass on weekends) Post Extras:       Peds sage Reged: 03/07/07 Posts: 268 Loc: Brasilia, Brazil Re: Connecting my W.O. 66mm to a DSLR? [Re: Mobius1]       #2666835 - 09/27/08 08:14 PM Edit   Reply   Quote Quick Reply   I use the WO 0.8x Reducer / Field Flattener together with a regular Canon T-ring. That's all you need to get nice round stars covering the entire sensor. The reducer/ff comes with one side being a SCT thread that is made specifically for connecting directly to the 66mm scopes. The other side is for your T-ring which connects the camera to the reducer/ff. P. -------------------- Orion 80mm ED Apo White William-Optics Zenithstar 66SD Apo Post Extras:       Tim C member Reged: 11/11/07 Posts: 31 Loc: Marietta, GA Re: Connecting my W.O. 66mm to a DSLR? [Re: Peds]       #2666884 - 09/27/08 08:59 PM Edit   Reply   Quote Quick Reply   ah, got it now. Thanks very much. -------------------- Tim My Astrophotos: http://mediafire.com/tcardinastrophotos Nexstar 8SE Denkmeier Powerswitch Diagonal LXD75 Mount Williams Optics Zenithstar 66 Canon xsi/450D (unmodified) Various eyepieces and other stuff Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 4 registered and 5 anonymous users are browsing this forum. 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