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.

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

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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.

  • 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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