Daniel_Buck
12-Jun-2008, 18:25
I've just picked up a fujinon 450mm, and I notice that the aperture closes down quite a bit more than the scale goes, the scale goes to f64, and it looks like the aperture closes down another 3 stops or so.
It looks like the aperture marks are in very even liner intervals, could I assume that the next 3 stops would follow the even intervals, no space difference between them? f90, f128, and then f180 I assume?
I don't expect to use more than f64, but since there's more room, I figure I might as well mark them. Is there a reason these were not marked? Is it just assumed that nobody will ever be stopping down passed f64, even though the aperture actually goes another 3 stops or so? I guess this is because it's in a small shutter (#1) that's meant for shorter lenses, so the physical size of the opening isn't very large?
It looks like the aperture marks are in very even liner intervals, could I assume that the next 3 stops would follow the even intervals, no space difference between them? f90, f128, and then f180 I assume?
I don't expect to use more than f64, but since there's more room, I figure I might as well mark them. Is there a reason these were not marked? Is it just assumed that nobody will ever be stopping down passed f64, even though the aperture actually goes another 3 stops or so? I guess this is because it's in a small shutter (#1) that's meant for shorter lenses, so the physical size of the opening isn't very large?