Do bigger focal lengths capture more light?
139331
Why doesn't exposure change when changing focal length?
13266
How much light and resolution is lost to color filter arrays?
140954
what's the relation between sensor size and image quality (noise, dynamic range)?
46148
Yongnuo YN-685 underexposure issue in bounce mode at longer focal length
103113
Why do zoom lenses and compact cameras have varied maximum aperture across the zoom range?
129613
Why does illuminance stay the same for a given f-stop even when focal length changes?
53395
If I want to shoot darker shots, is it better to increase the lighting and then darken in post to retain clarity?
70814
How can I maximize the "blurry background, sharp subject" (bokeh) effect?
91709
Examples in which the light maximizes the optical path length
98701
If a lens focuses all incoming light to a point, how do we get 2D images?
31618
Why do objects appear smaller when farther away?
34665
What image-quality characteristics make a lens good or bad?
134974
What is the focal length on your typical cell phone camera?
16777
Is there a limit to the resolving power of a mirror telescope?
26351
What macro techniques offer an alternative to expensive optics?
90109
Are cropped images from a full-frame sensor equal quality to full APS-C images despite the lower resolution?
21744
Focal length of an ellipse and related results