Is the sigma 50mm f 1 4 dg dn art good for street photography?

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From Sigma 50mm f/1.4 DG DN Art: Sigma 50mm f/1.4 DG DN Art: A prime lens by Sigma for Full frame cameras, 50mm f/1.4. Specs - Maker: Sigma - Focal length: 50mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): as marked, 50mm. - On APS-C (Sony E, L-Mount): like 75mm on full frame; f/1.4 gives about the ...

From Sigma 15mm f/1.4 DG DN Diagonal Fisheye Art: Sigma 15mm f/1.4 DG DN Diagonal Fisheye Art: A prime lens by Sigma for Full frame cameras, 15mm f/1.4. A fast full-frame fisheye, made with night-sky photography in mind.

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