Increase in lens power
117114
Naturally improve eyesight
1797
Do ND filters increase the dynamic range that a camera can 'see'?
58265
What happens to a lens when you turn the focus ring during AF mode?
104041
What does a lens hood do?
109652
What is the limiting factor in lens construction when it comes to f-stop values?
58821
How can the aperture value written in Exif be larger than the nominal limit of the lens?
133548
How can a speedbooster improve the light performance of a lens?
98701
If a lens focuses all incoming light to a point, how do we get 2D images?
150144
Is it safe to change the lens on my new DSLR?
73874
Does the quality of a UV filter make a difference when used with a cheap lens?
51290
Does my crop sensor camera actually turn my lenses into a longer focal length?
150402
Is it normal for focal length to change while focusing?
19362
Can a smaller sensor's "crop factor" be used to calculate the exact increase in depth of field?
68909
Is it dangerous to do a lens change with power on?
153578
Variable focal length for macro lenses?
124074
Does stacking more lens filters decrease overall image quality?
11096
Why does my aperture setting change as I zoom on my DSLR kit lens?