· 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   Flat   s58y Postmaster Reged: 12/12/04 Posts: 5502 Loc: Eastern NY Re: Which H-alpha filter?       07/01/09 11:47 PM Attachment (26 downloads) Edit   Reply   Quote   Quick Reply:   Second shot is with the Astronomik 13nm filter, 10 minutes, ISO400, 27% moon. Note that the stars are larger than on the first image, despite being dimmer. Note: It's hard to focus an H-alpha shot, since only the red pixels respond well in the small star image used for focusing. You see a checkerboard pattern with mainly red pixels. -------------------- Hutech 30D, SBIG ST-402 autoguider SV80S, TV102iis Old camera lenses: 800mm f/5.6, 180mm f/3.4 AP900, Barndoor tracker http://www.pbase.com/s58y Post Extras       Entire thread Subject Posted by Posted on Which H-alpha filter? cweinhei 06/29/09 12:34 PM Re: Which H-alpha filter? Samir Kharusi   07/02/09 03:55 AM Re: Which H-alpha filter? justabob   07/02/09 11:12 AM Re: Which H-alpha filter? Samir Kharusi   07/03/09 06:07 AM Re: Which H-alpha filter? justabob   07/03/09 08:20 AM Re: Which H-alpha filter? Samir Kharusi   07/04/09 03:59 AM Re: Which H-alpha filter? justabob   07/04/09 12:17 PM Re: Which H-alpha filter? Tonk   06/29/09 05:23 PM Re: Which H-alpha filter? Rankinstudio   06/29/09 07:09 PM Re: Which H-alpha filter? Freddy WILLEMS   06/30/09 02:39 AM Re: Which H-alpha filter? Igor   06/30/09 04:09 AM Re: Which H-alpha filter? gavinm   06/30/09 06:39 AM Re: Which H-alpha filter? Coliwabl   06/30/09 10:47 AM Re: Which H-alpha filter? Coliwabl   06/30/09 10:54 AM Re: Which H-alpha filter? justabob   06/30/09 10:59 AM Re: Which H-alpha filter? justabob   06/30/09 11:10 AM Re: Which H-alpha filter? cweinhei   06/30/09 01:32 PM Re: Which H-alpha filter? Nils_Lars   06/30/09 03:43 PM Re: Which H-alpha filter? KevinUK   07/01/09 07:06 AM Re: Which H-alpha filter? s58y   07/01/09 03:04 PM Re: Which H-alpha filter? cweinhei   07/01/09 03:51 PM Re: Which H-alpha filter? s58y   07/01/09 11:44 PM Re: Which H-alpha filter? s58y   07/01/09 11:47 PM Re: Which H-alpha filter? s58y   07/01/09 11:51 PM Re: Which H-alpha filter? s58y   07/02/09 12:10 AM Re: Which H-alpha filter? justabob   07/02/09 12:53 AM Re: Which H-alpha filter? cweinhei   07/02/09 04:47 PM Re: Which H-alpha filter? s58y   07/03/09 01:36 PM Re: Which H-alpha filter? KevinUK   07/08/09 01:37 AM Re: Which H-alpha filter? s58y   07/02/09 12:29 PM Extra information 4 registered and 11 anonymous users are browsing this forum. Moderator:  Charlie Hein, knuklhdastnmr  Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Rating: Thread views: 589 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

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