What is the difference between a 100mm lens and 100mm macro lens?
113574
What is a macro lens?
20086
Why is the amount of light a lens lets in called the 'lens speed'?
117216
Difference between focusin/focusout and focus/blur, with example
101960
Why are crop lenses indicated with focal lengths they don't have?
10956
How do I choose a macro lens for a Canon APS-C camera?
59156
What lens is needed to change the minimal focus distance length of my camera?
135149
How do camera body motors compare to in-lens motors for focusing?
112891
Why does the max aperture change when use Nikon 60mm AF-D Micro on D90 camera?
75334
Why do Full Frame lenses and crop body lenses exhibit the same crop factor when used on a crop body camera?
34665
What image-quality characteristics make a lens good or bad?
114778
What is the difference between DX format and FX format lenses, and which to choose for what purpose?
48863
Do I really need a fast 50mm lens?
158181
How does the lens diameter influence photo quality?
43256
Macro defining macro
35335
What is the relationship between focal length and shutter speed?
30952
What is the difference between EF and EF-S lenses?
71754
Why do two zoom lenses set to 200mm on the same camera produce different fields of view?