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Canon ef 35mm f 1 4l ii usm vs sigma 35mm f 1 4 dg hsm art?

Both are 35mm f/1.4 primes for full-frame cameras, and on a Canon body they frame and blur the same way. The difference is mostly where they fit and what they cost.

The Canon EF 35mm f/1.4L II USM only fits Canon EF bodies. The Sigma 35mm f/1.4 DG HSM Art fits Canon EF, Nikon F, Pentax K, Sony E and L-Mount, and it's common and cheap used. If you're on Canon, I'd pick the Sigma for value unless you specifically want Canon's own build. If you might switch systems later, it's the only one of the two that comes with you. If you want a newer mirrorless version, look at the Sigma 35mm f/1.4 DG II Art. For how 35mm works for people, see portraits.

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