I have seen a few examples of constant aperture zooms (eg a 28-100mm f/4 Ricoh.) in the secondhand markets where the aperture appears to be not fully open (visibly non-round hole) at some zoom settings. Did some designs actually do that intentionally to enforce the constant aperture, or are these just cases of mechanical defects where unrelated mechanical parts interfere with each other due to friction or bad justage?
Subscribe to:
Post Comments (Atom)
-
A wide angle lens has a wide angle of view, therefore it would make sense that the front of the lens would also be wide. A telephoto lens ha...
-
I have been trying to take pictures of dogwood blooms for a week now. I have the sharpness I want, but the flowers have a weird glow to them...
-
I know that a real gray card is the best thing to use to determine exposure. But I'd like to know if there are other naturally available...
-
I've read a lot around this site that an ideal quality of the lens is achieved when using f-stop roughly 2 stops slower than the fastest...
No comments:
Post a Comment