You are not logged in. [Login] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Observing >> Solar Previous   Index   Next   Threaded   Pages: 1 nightshooter sage Reged: 04/09/07 Posts: 324 Loc: South Shore, Long Island, NY Sun shot w/ ND 3.8 filter       #2146741 - 01/26/08 10:24 AM Attachment (35 downloads) Edit   Reply   Quote Quick Reply   Quick shot taken with Canon 30D & homemade ND 3.8 film filter. Cloud cover at 70% Seeing poor 2/5 -------------------- Rich AT 80ED Vixen GP2 Vixen A80SSWT DMK 21AU04.AS Lunt 50F / B1200 Post Extras:       Erix Toad Lily Reged: 12/25/04 Posts: 22532 Loc: Ohio, USA Re: Sun shot w/ ND 3.8 filter [Re: nightshooter]       #2146900 - 01/26/08 11:32 AM Edit   Reply   Quote Quick Reply   You took that with only a neutral density filter? -------------------- Erika Automatic doors make me feel like a Jedi. Zhumell 16", 10" LX200 Classic,Orion ED80, ETX70-AT, DS Maxscope 60mm My CN Gallery * 2007 July - tracking NOAA10963 Post Extras:       darkstar528 Postmaster Reged: 03/06/07 Posts: 7405 Loc: Hodgenville, Kentucky, USA Re: Sun shot w/ ND 3.8 filter [Re: Erix]       #2146947 - 01/26/08 12:03 PM Edit   Reply   Quote Quick Reply   I had to look that one up, never heard of an ND filter... -------------------- Blue skies, Stephen "Darkstar" Ames PST(#96038), VIXEN 8-24mm,CEMAX 2x Barlow, Thousand Oaks White Light Filter and a Meade Elec EP CFI, CFII, MEI, working on EIEIO! BAA Member My solar site: http://seemysunspot.com Post Extras:       cocobolo Carpal Tunnel Reged: 10/27/07 Posts: 1550 Loc: british columbia, canada Re: Sun shot w/ ND 3.8 filter [Re: darkstar528]       #2147059 - 01/26/08 12:59 PM Edit   Reply   Quote Quick Reply   Stephen: The "moon filters" are often referred to as neutral density. The adjustable kind can be turned way down to really darken the surface of a full moon. I'm surprised that Rich's pic was taken only with a n.d. filter. I looks more like through a baader type filter, rather than a neutral density. Note to Rich, how fast was the exposure? Keith Post Extras:       nightshooter sage Reged: 04/09/07 Posts: 324 Loc: South Shore, Long Island, NY Re: Sun shot w/ ND 3.8 filter [Re: cocobolo]       #2147200 - 01/26/08 02:15 PM Attachment (23 downloads) Edit   Reply   Quote Quick Reply   Hi All, Yes the photo was taken only with a ND 3.8 filter. The ND 5.0 filters are for visual but the ND 3.8 are only for photographic as they let much more light pass thru them. The exposure was... Canon 30D handheld 1/320 sec f/25 iso 800 300mm lens w/1.4x tele (420mm) -------------------- Rich AT 80ED Vixen GP2 Vixen A80SSWT DMK 21AU04.AS Lunt 50F / B1200 Edited by nightshooter (01/26/08 03:31 PM) Post Extras:       molniyabeer Confused and Asleep Reged: 01/08/05 Posts: 2965 Loc: Central Coast, California Re: Sun shot w/ ND 3.8 filter [Re: nightshooter]       #2147386 - 01/26/08 03:53 PM Edit   Reply   Quote Quick Reply   Rich, nice uniform coverage on the disk. Just to clarify, is that Baader photo-grade film in your filter cell? -------------------- Steve 16" Meade LightBridge (Beowulf) Lunt 60/50 Double Stack w/ Pressure Tuner 10" Hardin DSH, StarMax 127mm Mak Oberwerk 11 x 70 binocs Four Winds Bar Santa Maria Clear Sky Clock Figueroa Mt Clear Sky Clock Post Extras:       nightshooter sage Reged: 04/09/07 Posts: 324 Loc: South Shore, Long Island, NY Re: Sun shot w/ ND 3.8 filter [Re: molniyabeer]       #2148012 - 01/26/08 09:06 PM Edit   Reply   Quote Quick Reply   Steve, Yes, that is the "Baader AstroSolar Saftey Film" Photographic (ND=3.8). Todays conditions were very poor, so I'm sure with better seeing the exposures will be much quicker. Next time I'll shoot an AVI. -------------------- Rich AT 80ED Vixen GP2 Vixen A80SSWT DMK 21AU04.AS Lunt 50F / B1200 Post Extras:       cocobolo Carpal Tunnel Reged: 10/27/07 Posts: 1550 Loc: british columbia, canada Re: Sun shot w/ ND 3.8 filter [Re: nightshooter]       #2148200 - 01/26/08 10:37 PM Edit   Reply   Quote Quick Reply   Now it makes sense, thanks Rich. Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 4 registered and 11 anonymous users are browsing this forum. 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