What is the practical purpose of a lens hood if any?
104041
What does a lens hood do?
87632
How do I find the thread diameter of my lens?
18645
Is a UV Filter required/recommended for lens protection?
113574
What is a macro lens?
65219
Why do polarized sunglasses remove (most) reflections on car windows?
85837
What's the difference between real and effective aperture?
72059
What are the most suitable filter holders for my Samyang 14mm autofocus prime lens?
47999
How do you find out the "sweet spot" of a lens?
41048
If I have a 18-55mm lens, is there a point in buying a 35mm prime lens?
21235
How can I remove scratches from a lens?
26351
What macro techniques offer an alternative to expensive optics?
57370
What are the limitations of a typical kit lens as a general purpose lens?
75334
Why do Full Frame lenses and crop body lenses exhibit the same crop factor when used on a crop body camera?
27692
Why do I need an add-on lens to take smartphone macro photos?
109423
Purpose of universal property of a product.
16702
How do I rig each blade to fan out like an aperture lens?
101960
Why are crop lenses indicated with focal lengths they don't have?