Sigma 35mm f/1.4 DG II Art vs Tamron 35-100mm f/2.8: which to buy

This isn't a close-call between two similar lenses so much as a choice between two philosophies that happen to overlap at one focal length. The Sigma 35mm f/1.4 DG II Art is a fast single-focal-length prime; the Tamron 35-100mm f/2.8 is a short telephoto zoom that starts where the Sigma sits and reaches well past it. Both land in our pro tier with matching scores of 82, and both cover the Sony E and Nikon Z mounts, so the decision is about how you shoot, not which brand is "better." The Sigma runs a little more than the Tamron, but price is the smaller part of this call.

Pick the Sigma 35mm f/1.4 DG II Art if you want the widest aperture and a single, deliberate focal length. A bright f/1.4 prime is the natural choice for low-light work, environmental portraits, street, and anyone who values shallow depth of field and a compact, walk-around setup over reach. You commit to one angle of view and move your feet.

Pick the Tamron 35-100mm f/2.8 (Sony E / Nikon Z) if flexibility matters more than a single fast prime. One zoom covers wide-normal through short-telephoto, which is genuinely useful for events, portraits at varied distances, and run-and-gun shooting where you can't swap glass. You trade the prime's wider aperture for the freedom to recompose without changing lenses, and it comes in a bit cheaper.

The trap is treating these as interchangeable because the scores and tier line up. They solve different problems: if you already know you want 35mm and crave that f/1.4 look, a zoom won't replace it, and if you need range, no prime will reach 100mm. Decide whether you're buying an aperture or a focal range first, and the rest answers itself.