After reading reviews about what this lens smears, I decided to say a few words: For those who shoot for the first time with fast optics, I would advise you to try to understand how to do it correctly. When shooting with any fast lens, you can easily focus in the wrong place), so be careful, refocusing or an emergency visit to the optometrist will help you!) This lens, like all fast lenses, allows the camera to focus well in good light and in low light the camera will focus faster just in a clearly more contrasting area in the photo. It's the camera, not the lens! I adjusted mine at GOOD! lighting and center point - this is IMPORTANT! In low light, you should not photograph at all, but if you are a strobist and shoot, for example, club parties, then a radio trigger with AF illumination or illumination on advanced flash units will help you. Therefore, you should not blame the lens for having either back or front focus! Any lens or any thing can be defective, and in each case, you should be more careful when buying! And of course I wrote about the fact that the docking station is also a plus - a really useful thing! My next lenses will be SIGMA ART series only! And this is not advertising, just very good glasses, good contrast, smart AF, good build quality and of course this is the price! I am attaching a couple of cards to the description - just photos taken in different conditions. And he holds back and mixed light perfectly! In some photos I use flashes, since the spontaneous desire to take a picture does not always coincide with the lighting I need)) PS all photos are from a personal archive and are not commercial - I was too lazy to dig and threw off the latest ones (I chose specially with different shooting conditions)
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