Serene Life

by garik

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Ultra wide angle lenses are the ones with focal length shorter than shortest edge of imaging surface (24mm on 35mm full frame, about 16mm on APS-C).

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How do I rig up a color filter for my Sigma 8-16mm Ultrawide?

I am a bit confused... I'm not sure if the cokin system will work on my lens, as my lens doesn't have threads for a filter. I've found that placing a Z series cokin filter in front of the lens will ...