· 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 You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Observing >> Variable Star Observing and Radio Astronomy Previous   Index   Next   Threaded   Pages: 1 John Miele Carpal Tunnel Reged: 05/29/05 Loc: North Alabama ST-9XE Ad Edge 8 Combo?       #5534214 - 11/22/12 05:01 PM Edit   Reply   Quote Quick Reply   Hi All, I'm interested in doing some photometry and astrometry with my Edge 8 scope. Was thinking the ST-9XE might be a good combo. With it s 20 micron pixels I get an image scale of 2 arc-sec/pixel @ f/10 and a FOV = 17'. The built in guide chip should be a big help too. Was wondering if anyone else was using this combo and what you all might think about it> I am assuimng the ST-9XE is a NABG chip? Cany anyone confirm that? Thanks John Post Extras:       gavinm Carpal Tunnel Reged: 08/26/05 Loc: Auckland New Zealand Re: ST-9XE Ad Edge 8 Combo? [Re: John Miele]       #5534373 - 11/22/12 07:50 PM Edit   Reply   Quote Quick Reply   The ST9 is NABG. In my opinion, the ST9 is a small chip with large pixels, suited for long focal lengths. At ST7 will give roughly the same FOV if you use a reducer but with a smaller pixel scale. 2' is pretty big, but I don't know your seeing conditions. Post Extras:       John Miele Carpal Tunnel Reged: 05/29/05 Loc: North Alabama Re: ST-9XE Ad Edge 8 Combo? [Re: gavinm]       #5534412 - 11/22/12 08:24 PM Edit   Reply   Quote Quick Reply   Yea, I was just starting to think maybe 2 arc-sec/pixel would be too big. I could go with a ST-402ME which gives me a 0.93 arc-sec/pixel scale @ f/10. I need to plan for f/10 because right now there is no reducer for the edge 8 scope. Post Extras:       *skyguy* Pooh-Bah Reged: 12/31/08 Loc: Western New York Re: ST-9XE Ad Edge 8 Combo? [Re: John Miele]       #5535373 - 11/23/12 12:14 PM Edit   Reply   Quote Quick Reply   Hi John, I've been doing astrometry and photometry with my 12" LX200 and ST9-E camera for many years with great results. The scope uses a f/6.3 focal reducer (F.L.= 1920mm.) and with the ST9-E has an imaging scale of 2.19 arc-sec/pixel ... which is very close to recommended 2 arc-sec/pixel for astrometry. The camera's relatively large imaging chip provides a 19' FOV which is very important in maximizing the available number of comparison field stars for both astrometry and photometry. Also, the the NABG ST-9 cameras have a Full-Well Capacity of 150,000 e- ... one of largest available ... which will allow longer exposures before saturating, resulting in the "blooming" of the brighter field stars. That said, I would think the ST9-XE on the Edge 8 (f/10) and would be ... arguably ... the perfect combination for astrometry and photometry. Jim Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 0 registered and 1 anonymous users are browsing this forum. Moderator:  RLTYS  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 567 Jump to *Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Celestial Events*General Astronomy* -----   Beginners Forum   General Observing and Astronomy   Outreach   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Speciality Forums* -----   Arizona Science and Astronomy Expo   NEAF (Northeast Astronomy Forum) and NEAIC (Northeast Astro Imaging Conference)   AstroArt   Astronomy Clubs and Star Parties   Astronomy Software & Computers   AstroWebsites   Science! Astronomy & Space Exploration, and Others   Space Rocks   Stellar Media*Swap and Shop* -----   Shop and Swap Audio Components*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements*International Year of Astronomy 2009 - Forums are now closed.* -----   IYA Archive Info CN Forums Home

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