What is the difference between, for example, a Nikon 50mm DX lens and a Nikon 50 mm FX lens?
114778
What is the difference between DX format and FX format lenses, and which to choose for what purpose?
103113
Why do zoom lenses and compact cameras have varied maximum aperture across the zoom range?
24842
Does using an extender actually change the aperture of the lens?
101571
How do I choose a lens for my first DSLR to replicate the capabilities of my bridge camera?
46184
What should I consider when purchasing a macro lens?
34665
What image-quality characteristics make a lens good or bad?
507
Is there any significant difference between Nikon and Canon?
44637
What are the constructional differences between a macro and a regular lens?
96984
Is it lenses which make your photographs, not camera bodies?
86590
Why doesn't my "Nikkor AF" lens autofocus on my Nikon D3300?
20086
Why is the amount of light a lens lets in called the 'lens speed'?
20439
Do lenses have focal planes or focal spheres/ellipsoids?
81660
Does autofocus work better with f/2.8 lenses vs f/4 or slower?
5740
What is a good wide-angle prime lens for Nikon DX (APS-C) format?
4403
Nikkor f/1.8G 35mm or 50mm?
150144
Is it safe to change the lens on my new DSLR?
104812
What differences exist between third-party and official lenses for Canon APS-C DSLRs?