Why different lenses have different diameter filters?

Started May 2, 2013 | Discussions thread
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mobi1
mobi1 Forum Member • Posts: 65
Why different lenses have different diameter filters?

Which means I can't use same filter on all lenses!

If all lens are compatible with specific camera (say Nikon DX and compatible 3rd party lenses) then they have different filter diameters?

Is the glass diameter different too? If yes, does it mean different lenses will allow different amount of light in for same aperture setting?

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