Eric, good luck with that! A 500 mm lens is an absolute pig to hold still, so make sure you use a shutter speed of at least 1/500, if not 1/1000th.
the bad thing of mirror is that has
a razor blade d.o.f. even at 10-20 meters of distance so one must be
careful with focusing .
That isn't specific to mirror lenses, it's a consequence of 500 mm focal length with fixed f/8 aperture (can't stop down to f/22 or f/32 to get deeper DOF).
Then starts diffraction at higher f stop ,
f 11-16 would be enough .
I see large format photographers routinely using f/32, f/45, even f/64 with 300+ mm lenses. A significant factor, obviously, is negative size; you don't enlarge an 8x10 much if at all, but the big issue is actual aperture diameter. A 500 mm set to f/32 has an effective aperture of 500/32 = ~16 mm, while a 50 mm at f/16 has ~3 mm. Diffraction is FAR less significant on the 500 mm lens than on the 50 mm. With a pinhole, the tradeoff between geometric resolution and aperture is behind all the argument about optimum hole size, but any rule about smallest aperture that's "usable" on an actual lens needs to account for focal length.
Right now the only camera I have that has film in it is my Contax RTS III because I have a half-shot roll of color neg in it. I normally don't keep any camera loaded because I rarely can't finish a roll.
Let’s see, I've got the Nikon N70 in the Subaru loaded with Fuji Neopan 400, the Nikon F80 in the Ram 3500 loaded with Legacy Pro 100, and a Nikon F4 loaded with ? here in the house. I really need to finish the roll in the F4.Yep, I keep a camera in each vehicle, which here in San Francisco is no big deal. If I lived in Phoenix or someplace else where it gets real hot I might have to rethink that. Oh, almost forgot, 6 sheets of FP4 loaded for the 8x10.
4 Total.
Roger
N70, F80, F4 ... what about the F90 and F100? I demand equal time for all!
I have the opposite problem, because 36 exposures are way too much.
I used the F100 recently, need to put a roll or two the two N90s's and let’s not for the 2 N8008s's and the 2 N80's. Then there’s the F, F2, F3 and FG. You know I was really happy with my N8008s for many years, then I inherited a F2 when a friend passed away, and that started me down this Nikon rabbit hole for which I see no escape.
Let’s see, I've got the Nikon N70 in the Subaru loaded with Fuji Neopan 400, the Nikon F80 in the Ram 3500 loaded with Legacy Pro 100, and a Nikon F4 loaded with ? here in the house. I really need to finish the roll in the F4.Yep, I keep a camera in each vehicle, which here in San Francisco is no big deal. If I lived in Phoenix or someplace else where it gets real hot I might have to rethink that. Oh, almost forgot, 6 sheets of FP4 loaded for the 8x10.
4 Total.
Roger
Yep, I keep a camera in each vehicle, which here in San Francisco is no big deal. If I lived in Phoenix or someplace else where it gets real hot I might have to rethink that.
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