How does focal length determine lens quality?
49187
What is focal length and how does it affect my photos?
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?
145622
How do constant aperture zoom lenses work?
109652
What is the limiting factor in lens construction when it comes to f-stop values?
21523
How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.6?
59156
What lens is needed to change the minimal focus distance length of my camera?
44637
What are the constructional differences between a macro and a regular lens?
11996
How do I find the right size of filters for a lens?
150402
Is it normal for focal length to change while focusing?
88406
What does different focal length offer me?
11197
How do I convert lens focal length (mm) to x-times optical zoom?
47620
How does a circular lens produce rectangular shots?
98701
If a lens focuses all incoming light to a point, how do we get 2D images?
148161
Sharpness and bokeh comparison of Nikon 50mm f/1.2, f/1.4G and f/1.8G
146325
How is zoom measured?
144558
Lens with small scratches on the front element - how do they affect IQ?