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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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  • \$\begingroup\$ Voted to close as this question is primarily opinion based. \$\endgroup\$ Commented Jan 10, 2019 at 15:06
  • \$\begingroup\$ @MikeSowsun We can easily answer "how can calculate or find the filter size for each different lens". The "must have" bit is I agree problematic, but that can be edited out... \$\endgroup\$
    – Philip Kendall
    Commented Jan 10, 2019 at 15:14
  • \$\begingroup\$ We also have the highly voted but old What are the must-have filters for a new photographer?. \$\endgroup\$
    – Philip Kendall
    Commented Jan 10, 2019 at 15:18
  • \$\begingroup\$ shop.usa.canon.com/shop/en/catalog/… is this lens? The filter size is in the spec sheet. \$\endgroup\$
    – user31502
    Commented Jan 10, 2019 at 17:09

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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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  • \$\begingroup\$ 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.... \$\endgroup\$ Commented Jan 11, 2019 at 8:51
  • \$\begingroup\$ 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. \$\endgroup\$ Commented Jan 11, 2019 at 20:47
  • \$\begingroup\$ Only if you buy your filters new :) Perfectly intact linears tend to be inexpensive on the used market.... \$\endgroup\$ Commented Jan 12, 2019 at 0:32

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