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Recently i purchased a Canon EOS M50 Mirrorless Camera Kit w/EF-M15-45mm Len. i'm a beginner in photography. kindly advise me to find a proper filter for my lens. how can calculate or find the filter size for each different lens and what is the "must have" filter rings for my Canon EOS M50.

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marked as duplicate by Mike Sowsun, Hueco, mattdm, scottbb, xiota Jan 14 at 0:29

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See:

front view of 15-45

See that number at the bottom (top if you're standing on your head)? That's the filter size you need.

I'm a sucker for protection filters with hardened glass, but this lens is probably too cheap to justify the cost. Plus, they don't change the image (if best).

I think a C-polarizer filter will give you the most fun, in sunny daylight conditions.

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  • The question is, does a polarizer for an EOS M need to be circular? Many mirrorless cameras can handle both linear and circular just fine.... – rackandboneman Jan 11 at 8:51
  • Good point, linear polarizers confuse the AF or AE behind the mirror of an SLR. But you're gonna have a hard time finding other than circular polarizers anymore, that's where the mass market is. The 1/4 wavelength retarder won't have any influence on the picture, or it might even reduce glare from the reflection of the CMOS sensor. – Jeroen van Duyn Jan 11 at 20:47
  • Only if you buy your filters new :) Perfectly intact linears tend to be inexpensive on the used market.... – rackandboneman Jan 12 at 0:32

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