Jac, in the 1936 catalog SOM Berthiot claimed that f/14 Perigraphes cover 106 degrees cleanly and illuminate 112 degrees.
Jac, in the 1936 catalog SOM Berthiot claimed that f/14 Perigraphes cover 106 degrees cleanly and illuminate 112 degrees.
Insanely slow? How about the f/18 Protar?
There are faster modern lenses that cover 120 degrees at around f/8. 35/4.5 Apo Grandagon, for example, but it isn't a large format lens. The 55, which just covers 4x5, covers 110 degrees. Schneider has a 120 degree lens too, you can look it up.
Scheme away. I b'lieve the path is well-trodden -- as I've told you, the 44/5.6 Super Aviogon covers 4x5, so at least 119 degrees, but probably not wide open -- and very steep. I hear that the air is thin at the summit. Can you afford Sherpas to carry you and your supplemental oxygen all the way to the top?
Jac et. al.,
Has anyone actually tried one of those fisheye "adapters" on 8x10? I know Kenko made one with 52mm threads that would fit some lenses. Not sure if there are larger thread-size adapters. Of course image quality will suffer...but it's 8x10, how much do you need?
That's long been something I've wanted to try but just never found one inexpensively when I was thinking about it.
I still hope to see what you come up with. I think I saw a pic of the bomber window you refer to on one of the Facebook groups? Unless there's another floating out there. Either way, sounds interesting.
Speaking of non-economical solutions, I'm still hoping for a 75mm Hypergon to drop into my lap!
I used one for a long time for 4x5's with a 65mm f8 SA, and it worked well... A bit smaller than the film frame (but larger than a 6x6 frame) but looked great shooting chrome film... A 75mm probably would have been better for image size... Mine had a series 7 thread that would mount to many lenses somehow... The outer ring of the image had a slight loss of definition, but very passable for use, but I suspect all classic fisheye lenses would...
Best FL would be medium wides as you loose the full image with even a normal FL...
There can be flare outside the circle as it covers such a WA, and some light bounces out of of image area...
Fun, and I even used it for pro use several times for architecture jobs...
Steve K
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