What focal length and quality of lens do I need to read 15cm high text at 500m away?
10820
What is the formula for percent of frame filled at a specific distance and focal length?
35335
What is the relationship between focal length and shutter speed?
57844
What lens focal length most closely resembles the perspective of the human eye?
34583
How can I calculate sensor size (width and height) from focus length, vertical, and horizontal angle of view?
97709
How can I take crisp sharp shots without an expensive lens?
80219
What is the relationship between field of view and focal length for fisheye?
34665
What image-quality characteristics make a lens good or bad?
58821
How can the aperture value written in Exif be larger than the nominal limit of the lens?
152115
Can I convert binocular zoom to equivalent lens focal length?
93638
How can I get the most possible depth of field out of close-up/macro shots?
11197
How do I convert lens focal length (mm) to x-times optical zoom?
109652
What is the limiting factor in lens construction when it comes to f-stop values?
48715
Photographic techniques to avoid chromatic aberration?
8552
Which focal-length lens is usually used for portrait photography, and why?
1684
How to maximise contrast range of distant landscapes with blue haze?
95190
What should I look for in lenses for long range and close up animal and natural shots?
82290
Are there any cheap, fast lenses capable of highschool sports photography?