What is the limiting factor? E.g (thought experiment) If we are 200m away from a tree (let's pretend it's perfectly stationary) and we take an exposure for a week, shouldn't we collect enough photons ...
Maybe it is clear from my question that I don't know much about lenses, both on binoculars and super-zoom cameras, for example I don't know how can I compare the light that enters a binocular with a ...
When zooming with lenses without a fixed max aperture, the change in aperture* that the camera displays is stepwise, usually in steps of thirds. But, is the max aperture really the same all the way as ...
I am new to the photography field, there are few things which I am not able to understand. I am playing around with my Nikon D90 along with its kit lens (18-105mm). While reading about Depth of ...
What is the technical name for a lens which has the same maximum aperture throughout the entire zoom range?
I was puzzled recently when I did some test shots with my Canon A800 by shooting the same (landscape) scene with and without full optical zoom and with the camera program set to SCN - Sunset. (Sunset ...
Possible Duplicate: Why do zoom lenses and compact cameras have varied maximum aperture across the zoom range? It is rather common with zooms that the maximum aperture changes (in fact, ...
Why does a camera's maximum (allowed) aperture get smaller when you increase its zoom?
Now that I am finally getting a fast zoom (Tamron 17-50mm 2.8) I've been considering a fast prime to go with it, specifically a Sigma 50mm 1.4. Despite its shortcomings, it still does really nice ...
I know that the aperture size has a direct effect on the depth of field. However, what about distance to the subject? Let's say I took two pictures, one at 24mm and one at 70mm, using the same lens ...