Sigma DC 50-100mm f/1.8 HSM Art

Perfect for 4k Video on a Canon 5D Mark IV This lens turned out to better than I expected it to be. I only use it for 4k video so this review does not lend itself to the photography capabilities. Shooting with a Canon 5D Mark IV, this lens is incredibly sharp. A relatively short range in focal length, but that doesn't bother me one bit. Shoots well in low light situations (video). A lot heavier than I thought it would be before I purchased it but for the situations I use if for (wedding ceremony & receptions) it's always on a tripod or monopod. 5D4 has a 1.74 crop in 4k mode so I get about an 87-174mm focal length, which is perfect for my use. Drawback is that this lens is made for APS-C sensors so I can't use it for photography work. There just aren't any telephoto lens' on the market that stop as wide as f/1.8, which is why I purchased it. And yes, at a good distance away from the subject, I have shot as wide as F1.8 when in really low light situations and its really fast to focus (on the 5D4). As long as the subject is not moving too quickly, it's not hard to find and keep focus. Again, this is from the 4k video perspective on a 5D4. It really is impressive. Read full review

Great lens with beautiful image, but really bad focus breathing Image you getting from this lens is wonderful. The build quality is great and it feels very solid. (Although it on a heavy side). There is one major drawback for me: it's focus breathing! It's so bad, that at first when I rotated the focus ring, I though I'm zooming! It change the focal length so drastically (about 30% from close focus to infinity). It's very bad for video purposes. For photo it's not a problem at all. Focus motor is pretty slow, but works ok. Not usable for video, but for slow pace photo-shooting environment it does work fine.

Do you really need f1.8 ? This is a very heavy lens, and nearly as big as the typical 70-200mm lenses. Overall I like it, but it doesn't really have much range from 50-100mm isn't a huge difference, or really just a few walking steps forward if using a prime 50mm. So a 70-200mm f2.8 such as the Tamron may be a better option for you. Also something to consider is this is made for crop sensor bodies, so unlike the Canon 70-200mm F2.8, this can't be used on a full sensor body. However, the lens is very sharp with a beautiful image, and the focus ring is long and smooth for easy video focusing. The auto focus is not as responsive as the Sigma 18-35mm which I think is all I would have purchased, given that I already have a 50mm, 85mm & a 135mm (manual focus Rokinon lenses). Overall I can do without the Sigma 50-100mm, but I'm completely very happy with the Sigma 18-35mm which is a must have lens. The 50-100mm is not a must have for me. Read full review