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Pages: 1 | 2 | 3 | (show all) jgraham Postmaster Reged: 12/02/04 Loc: Dayton, Ohio Re: Large format (4x5) astrophotography [Re: erie patsellis]       #2846249 - 01/05/09 10:42 PM Edit   Reply   Quote Quick Reply   Years ago I built a couple of cameras that used 4"x5" sheet film and one that used 5"x7". They were a lot of fun to use and at the time they were the best way to get wide and high resolution fields. My favorite camera used a Jaeger's 60mm f/10 achromatic mounted in a soup can on a lightweight camera box made from Balsa wood. The focus was set by taking a small set of star trails and indexing the lens which was finally glued in place to fix the focus. A flexible magnet was mounted around the edge of the can to hold the 'shutter' in place. I had a lot of fun with that camera. Post Extras:       Joneil Vendor (O'Neil Photo) Reged: 09/28/05 Loc: Lost City of Lemuria Re: Large format (4x5) astrophotography [Re: jgraham]       #3066824 - 04/25/09 06:55 PM Edit   Reply   Quote Quick Reply   If anyone needs some help with any aspect of 4x5, feel free to e-mail or PM me directly. As for astro-photo work, I still have a 4x5 astrograph I built. See an old article here: http://www.start.ca/users/joneil/astrgph.html I am still very much into large format photography of all kinds. the only thing holding me back the past little while has been a big hernia, and now, recovery form the hernia surgery. I am getting much better, but even still, hurts to hold 10x70 binocs above my head. GRR. Looking at getting back into using my old astrograph. The new T-max 400 B&W , while not greatly red sensitive, does have excellent reciprocity characteristics, and just to really weird you all out, I still 4x5 Tech Pan, and a hypering kit. joe Post Extras:       menglong wong member Reged: 12/05/08 Re: Large format (4x5) astrophotography [Re: Joneil]       #3067116 - 04/25/09 10:21 PM Edit   Reply   Quote Quick Reply   just want to try, after i get well with my pentax67s Post Extras:       Nebhunter Carpal Tunnel Reged: 10/04/03 Loc: Frostbite Falls Re: Large format (4x5) astrophotography [Re: Joneil]       #3069463 - 04/26/09 10:41 PM Edit   Reply   Quote Quick Reply   Joseph - glad to see you lurking here. Get well, and in the meantime, make plans for a film come back. Igor Post Extras:       Nightfly scholastic sledgehammer Reged: 06/20/07 Loc: Eastern Maine, USA Re: Large format (4x5) astrophotography [Re: Nebhunter]       #3069864 - 04/27/09 06:39 AM Edit   Reply   Quote Quick Reply   Joe, Hoping a speedy recovery. Large format is a challenge I'm sure. Keep shooting! Jim Post Extras:       Joneil Vendor (O'Neil Photo) Reged: 09/28/05 Loc: Lost City of Lemuria Re: Large format (4x5) astrophotography [Re: Nightfly]       #3070480 - 04/27/09 01:01 PM Edit   Reply   Quote Quick Reply   Well you know, there's a lot of similarties between large format photographers and amatuer astronomers. Those being, but limited too... 1) both are anal-retentive about optics, although instead of "Tak vs Tele-Vue" it's " Schenider vs Rodenstock"; 2) both groups haul around way too much equipment, and often into desolite and far off places; 3) There's never a tripod that is both large enough, light enough, steady enough and dampends vibrations fast enough; 4) You never, ever have enough eyepieces or lenses; 5) The disease grows, and spreads.. I mean, I have 4 telescopes. I have four, 4x5 cameras. I have one, 8x10 camera. I have 5 pairs of binoculars. I have three microscopes - no wait, four now. ...it just never ends....... In short, members of both groups are completely nuts. Edited by Joneil (04/27/09 01:02 PM) Post Extras:       Nightfly scholastic sledgehammer Reged: 06/20/07 Loc: Eastern Maine, USA Re: Large format (4x5) astrophotography [Re: Joneil]       #3071326 - 04/27/09 07:01 PM Edit   Reply   Quote Quick Reply   If we are nuts, lets hope sanity never sets in. There probably is a fine line between genius and crazy. Post Extras:       Nebhunter Carpal Tunnel Reged: 10/04/03 Loc: Frostbite Falls Re: Large format (4x5) astrophotography [Re: Nightfly]       #3073754 - 04/28/09 09:11 PM Edit   Reply   Quote Quick Reply   Unfortunately - I'm on the crazy side of the line. Igor Post Extras:       Doug L sage Reged: 08/17/08 Loc: Ottawa, Canada Re: Large format (4x5) astrophotography [Re: Nebhunter]       #3139411 - 06/01/09 09:49 AM Edit   Reply   Quote Quick Reply   Uh-Oh! I shouldn't have looked at this topic. Even though I've recently purchased a DSLR, I'm now thinking of starting a project that's been on the shelf for ages. I've got a homemade 4x5 camera box - originally built by a friend for his Aero-Ektar lens, lots of 4x5 film holders, film taking up space in the freezer, and a wonderfully sharp Rodenstock Grandagon 75mm lens. The lens was built for a slightly smaller format, but if I remember my couple of test shots, will just cover the 4x5 film. Even though digital composite montages are probably better for wide deep-sky fields, the simplicity of shooting a single widefield image has a lot of appeal for me. And I still believe that large-format film would be the ultimate for super-big prints of long-exposure star trails, colourful sunsets and bright aurorae. Maybe it's time to get the project underway again. Post Extras:       Suk Lee Post Laureate Reged: 10/07/03 Loc: Pleasanton, CA Re: Large format (4x5) astrophotography [Re: Doug L]       #3140765 - 06/01/09 09:29 PM Edit   Reply   Quote Quick Reply   Mwahahaha... Post Extras:       Nebhunter Carpal Tunnel Reged: 10/04/03 Loc: Frostbite Falls Re: Large format (4x5) astrophotography [Re: Doug L]       #3141914 - 06/02/09 02:10 PM Edit   Reply   Quote Quick Reply   I think the hook is set. You have the DSLR - mount it - no auto guider required - set timer - press shutter. Next shot. Challenge - little - satisfaction in the effort - little - overcoming the odds - easy. Film - well you description of what you have - and what you would like to do tells all. Enthusiasm, a challenge, and above all - FUN at doing something which grabs you. The world of ANALOG. That which is recorded in the True Light. No conversion software required. Welcome to the Funny Farm. Igor Post Extras:       Nebhunter Carpal Tunnel Reged: 10/04/03 Loc: Frostbite Falls Re: Large format (4x5) astrophotography [Re: jgraham]       #3141928 - 06/02/09 02:19 PM Edit   Reply   Quote Quick Reply   I'm sorry I missed reading your post earlier. Simpler times and making things work without spend a ton of money = FUN. The satisfaction one gets from enjoying a hobby is what keeps us going. Ever think of getting back into it in one form or another? I'm thinking this forum could really get going with the small group of enthusiasts by simply sharing these stories and enjoying each others experiences. It's our world - the solitude - the single minded determination - the enjoyment of the night sky. No telemarketer will bother you in the middle of it. Ours to enjoy. Yours to share. Igor Post Extras:       Nebhunter Carpal Tunnel Reged: 10/04/03 Loc: Frostbite Falls Re: Large format (4x5) astrophotography [Re: Joneil]       #3141931 - 06/02/09 02:23 PM Edit   Reply   Quote Quick Reply   Knock - Knock - Joseph. Your turn for a story or two. In reading Robert Reeves book on Astrophotography I find photos and mention of your name. Please share more stories with us. Group therapy for those of us who are still - OUT THERE. Great story on the astrograph. Enjoyed it. Igor Post Extras:       Rick Thurmond sage Reged: 10/30/06 Loc: California Re: Large format (4x5) astrophotography [Re: Nebhunter]       #5373741 - 08/17/12 07:54 PM Edit   Reply   Quote Quick Reply   I just put together a 4x5 camera for astrophotography. The camera and results are at http://www.rickthurmond.com/GraphicViewAstrophotos/ Post Extras:       Eric P sage Reged: 04/04/05 Re: Large format (4x5) astrophotography [Re: Rick Thurmond]       #5373794 - 08/17/12 08:35 PM Edit   Reply   Quote Quick Reply   Rick, those are fantastic images. Post Extras:       Kona member Reged: 10/22/08 Re: Large format (4x5) astrophotography [Re: Eric P]       #5387378 - 08/26/12 01:47 AM Edit   Reply   Quote Quick Reply   Rick, you and I are birds of a feather. I have the exact same lens that I use for the exact same purpose on a slightly different camera and mount. Try stopping down to f/8 for a few exposures. It'll eliminate the coma in the corners that you're getting at f/5.6. Post Extras:       Hikari scholastic sledgehammer Reged: 01/05/11 Loc: Maine, USA Re: Large format (4x5) astrophotography [Re: Kona]       #5387801 - 08/26/12 11:40 AM Edit   Reply   Quote Quick Reply   Rick, a telephoto should always have a shorter flange distance than the focal length. It is actually part of the design that defines a lens as telephoto. View camera lenses are no optimized to be used wide open. Very nice camera. Post Extras:       Pages: 1 | 2 | 3 | (show all)

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