You asked

Sony distagon t fe 35mm f 1 4 za vs sigma 35mm f 1 4 dg dn art?

Both are 35mm f/1.4 prime lenses for full frame, with autofocus and no stabilisation. On a full frame body they frame the same, and on APS-C they both behave like a 52mm lens. The site lists no prices or optical test results for either, so I can't rank their sharpness.

The real difference is mounts. The Sony Distagon T* FE 35mm f/1.4 ZA fits only Sony E bodies. The Sigma 35mm f/1.4 DG DN Art fits both Sony E and L-Mount, and its camera list also covers Leica, Panasonic and Sigma bodies.

If you're committed to Sony, either lens will do the job, so choose on price and availability. If you think you might switch systems later, I'd pick the Sigma, because it travels with you.

Written by Claude from this site's pages.

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