· Get a Cloudy Nights T-Shirt · Submit a Review / Article    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] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing Previous   Index   Next   Threaded   Pages: 1 gquinzi super member Reged: 10/26/07 Posts: 151 Question about filter type and size       #2102419 - 01/07/08 02:08 AM Edit   Reply   Quote Quick Reply   Hi all, I've noticed quite a few folks are using broadband filters to shoot in moderately polluted areas. My question is which filter and what size should I be looking for. I use an 8" sct with an f6.3 f/r, an ED80 for widefield (no reducer) and an XT to capture the light. I see filter sizes in the 1.25 and 2" range and am not sure where it would be applied/threaded in the optic train. Any advice is greatly appreciated. -------------------- Orion 80ED w/ WO .8X FF and WO focuser upgrade ST-80 Meade 8" SCT F6.3 F/R LXD75 Hypertuned w/Star patch GPS Baader modified Canon 350D DSI Pro PHD Guiding DSLR Shutter Orion Dynamo Pro 17 (power tank) A couple o' Naglers A couple o' generic plossl's Post Extras:       ccs_hello Post Laureate Reged: 07/03/04 Posts: 3300 Re: Question about filter type and size [Re: gquinzi]       #2102607 - 01/07/08 07:30 AM Edit   Reply   Quote Quick Reply   Hi, Using telescope OTA as lens for prime focus DSLR imaging, 2" filter is appropriete. You have to check your specific gears to find a 2" female thread for the filter to fit. Clear Skies! ccs_hello Post Extras:       ericjacob613 Photon Hog Reged: 05/25/07 Posts: 3754 Loc: Santa Barbara CA Re: Question about filter type and size [Re: ccs_hello]       #2103752 - 01/07/08 06:08 PM Edit   Reply   Quote Quick Reply   My 2 inch Orion SkyGlkow perfectly threads into a 48mm step ring. -------------------- "Is that boy on the moon again?" - Gumby's Dad. Post Extras:       gquinzi super member Reged: 10/26/07 Posts: 151 Re: Question about filter type and size [Re: ericjacob613]       #2104289 - 01/07/08 10:16 PM Edit   Reply   Quote Quick Reply   Thanks, appreciate it. -------------------- Orion 80ED w/ WO .8X FF and WO focuser upgrade ST-80 Meade 8" SCT F6.3 F/R LXD75 Hypertuned w/Star patch GPS Baader modified Canon 350D DSI Pro PHD Guiding DSLR Shutter Orion Dynamo Pro 17 (power tank) A couple o' Naglers A couple o' generic plossl's Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 5 registered and 3 anonymous users are browsing this forum. Moderator:  Charlie Hein, knuklhdastnmr  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 250 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   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   General Observing   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*Other* -----   Science of Astronomy & Space Exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements CN Forums Home

Cloudy Nights Sponsor: Astronomics