NEW: the evaluation of the connection with the failure of the focus has been lowered, and this is the second time it has been done. When it failed for the first time, six months later, they fixed it for free under the warranty (I took it in to a Sigma corporate store), but when it failed for the second time, after another six months, the focusing mechanism stopped working. Only now has the store been "swept away" because neither its website nor its phone are operational anymore. I am still unsure how to proceed with it at this point. The second one available for purchase:(( When shooting for business purposes, you are unable to use the lens without first focusing it. For me personally, this lens was the solution to a lot of issues. Now, I shoot with a crop-sensor digital single-lens reflex camera, but I intend to upgrade to a full-frame camera in the near future. It is difficult to get rid of a crop of two or more persons for fifty dollars if there are many people in the room. In addition, when working with low light, the shutter speed should be increased, and the aperture should be closed down. In direct proportion, the quality deteriorates. And at 35 meters, a group of three people at f/2.8 and 1/60 proved to be an enjoyable subject to photograph. In addition, the image seems to take up more space than 50 millimeters. Read the test at http://www.lenstip.com/359.5-Lens review-Sigma A 35 mm f 1.4 DG HSM Chromatic and spherical aberration.html if you are having trouble deciding between Nikon lenses. I strongly suggest that you get this lens because the price-to-quality ratio is significantly more favorable than that offered by Nikon. It has a better picture than the alternatives to the Nikon Ai-S 35F2.0 (I have one), the lens is lighter, but the manual aperture starts at 2.8 and the maximum working aperture is 35. If they and sigma are removed at 4.0, then the transition to blur and bokeh will make Nikon's picture taste better. Bokeh and blur are transitional effects. Both feature a faithful representation of colors.
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