What is the difference between STM and USM in a lens?
10440
What does STM mean on a Canon lens?
35335
What is the relationship between focal length and shutter speed?
47315
How needed is the Image Stabilization on the Canon 70-200 f2.8 L USM lens?
53448
Do bigger focal lengths capture more light?
113574
What is a macro lens?
37422
Since it's not "focal length", what is the term for the distance at which things are in focus?
10570
Does sensor size affect lens distortion?
62822
How can lens cause consistent front or back focus?
96529
How can I calculate magnification ratio I get by reversing a lens?
17851
How does using a lens with some focal length on a full frame camera differ from using a lens with "equivalent" focal lens on a crop camera?
135149
How do camera body motors compare to in-lens motors for focusing?
34665
What image-quality characteristics make a lens good or bad?
5000
Do smaller apertures provide more depth of field past the diffraction limit, even if peak sharpness suffers?
109692
How does a spherical lens differ from an aspherical lens?
87632
How do I find the thread diameter of my lens?
40865
What should I do when I have lenses with different filter thread sizes?
46184
What should I consider when purchasing a macro lens?