what is the barriers of making fast lenses?
109652
What is the limiting factor in lens construction when it comes to f-stop values?
29080
How do extension tubes affect focusing distance?
82290
Are there any cheap, fast lenses capable of highschool sports photography?
129284
Why no zoom lenses with a maximum aperture wider than f/2.8?
85191
Are manufacturers' Image Stabilisation ratings for zoom lenses deceptive?
145622
How do constant aperture zoom lenses work?
153578
Variable focal length for macro lenses?
70690
Why are only certain shutter speeds or apertures available?
31075
What can be done using a 18-55mm lens?
144558
Lens with small scratches on the front element - how do they affect IQ?
21523
How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.6?
80997
What advantages does manual mode have over aperture priority mode?
43047
Why do some lenses cost 10 times as much when the specs are very close?
42808
Simply bad focus or too big aperture?
107952
Do different lenses affect noise level?
69847
Why don't DSLRs come equipped with "classic" focusing screens (split prism, etc)?
22161
How do I get adequate depth of field in macro photography?