There are 2 1/4 x 3 1/4 Speed and Crown Graphics, when used with sheet holders the ground glass is not removed. But they probably don't have enough bellows for a 300 that isn't a telephoto design. Not sure a 6x9 Linhof would either.
I don`t get it.Yes I was thinking of sheet film not roll film. Are there 300mm telephotos that could be used with reasonable shutter speeds (>125th) and say 8 feet of DOF on either side at 60 ft? Im thinking EV in the greater than 12 range. Thanks
... and the more I think about your questions of late, why not just use a MF camera? Seems much more convenient. I use roll film backs on speed graphics but mostly as a novelty. For any "real" photography that doesn't need movements or large film for contact printing, I find a MF SLR much easier to use. Rather than a 300mm on a view/press camera I'd opt for a 250 on a MF camera, like a Hasselblad, with a monopod/tripod any day.
It might help if you discuss a bit more about what you are intending/desiring to do.
I would like to shoot birds (photographically) in flight from a prefocused, tripod mounted camera in a camo, bird blind located in their regular hunting flight paths. I want 6x9 or bigger format and plan to be no more than 100 feet from the target. I especially like front and 3/4 view shots. Large birds. Raptors, Herons, cranes, pelicans.. I have no interest in 1200mm lenses on 35mm cameras. I would rather put effort on getting close, being disguised as close range hunting. Big frame filling images of these birds on big film for 'razor sharp' (sorry ian) black and white darkroom prints to 20 x30.
I have considered Pentax 6x7, Pentacon Six, Speed Graphic and Mamiya. Budget is a factor and I like vintage stuff. I do not envison seeing a random bird an quickly raising the camera, focusing and shooting. I have no interest in this.
I have had shots I couldnt take because my lens was too big and the image would not fit on 35mm. If only I had bigger film, with this 300mm focal length lens. Crown graphic/Speed graphic seemed right since it has big film and interchangeable lenses to 450mm. I dont even need the whole size of film 4x5. Even if I compose for 6/9 I can print it on my 23C and still get what I want.
I like leaf shutters not big clunky focal plane shutters and big clunky mirrors going up and down. A nice leaf shutter to 1/500, tessar lens, mirror lock up or ground glass, sheet film (I dont mind cutting it). But now Im learning that DOF is reduced in LF even with the same focal length lens. Also, smaller apertures and longer shutter speeds are required. Obviously I cant snap birds in flight at 1/15 second if it is only 100 feet away even if it is flying straight at me. So much to learn.
I imagine pre focusing the camera on a tripod and positioning my blind strategically so when the bird flies into my focus zone I can be there to freeze him in time, forever or until something bad happens to my negatives whichever comes first.
Ok.
So you need some 30" paper. Probably a 20" roll. Be ready to spend $300, $400 for the paper. And the trays, etc.
Then, wait for the light, f45 or closer will be right for a 20x30" print.
The bird. At 100ft, magnification is 1:100. You need a bird about the size of a Harley Davidson to appear in the middle of the frame with no more than 20-30mm wide (wings), maybe 5mm height.
Sharpness could be an issue here. The shutter speed should be high. Maybe over 1/500.
Not an easy task, I`m afraid.
Again, what Brian said. A smaller format will make things easier.
Resolution is a factor to take into account in a given print size, as is, according to your requirements, the depth of field. 20x30" is so big.
And the depth of field is related to magnification. So smaller formats have their advantages here. You may need to shoot at f45 for DoF in 6x9, while at a wider aperture for the same DoF in a smaller format. All this is photography basics.
Why would DOF be different with a bigger piece of film and the same lens from the same distance?
I said a Harley because I think it is about 6-9ft lenght... a 7.5ft is certainly a big bird. You can calculate magnification with a 300mm lens, at 100ft (30 meters) it wil be 1:100... aproximately 25mm in the middle of the frame. Not a big deal.
But this does not solve for distance. . For Example: How far must I be away from a 7.5 wingspan bird with a 300mm lens to fill a 6x9 frame?
There are not so many prints in 20x30", actually. Well, this is a "compact" size for Clide Butcher... In fact, I think there are not sheets in 30" (I know 20x24"), you probably need to go for paper in rolls. Check B&H for prices.
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