Excerpt: I picked this lens up for my Sony A7Ii and I'm very happy with the image quality so far. In my subjective comparison, it appears lot sharper and with more definition than MF Contax Zeiss lenses (28 and 70-200) that I used with a variety of adapter. Some of the cons are long focus travel, size/weight and vignetting at 2.8, which can be easily corrected in post. All in all, amazing value and I can't wait to try some night photography with it soon.
Summary: 4 or 5 stars, hard to choose, but I'll give it a 5. Can't really fault it especially at the price. It is tack sharp... at f8 where I think most people will use it anyways. Haven't used it much at wider apertures. It's a must to use the screen at 10x (on 5D3) to nail focus, almost impossible to use the viewfinder.
Excerpt: I bought this lens to take architectural photos. Taking monthly shots from a house being built and the progression. I needed a lens that could capture a whole room in one shot. It's relatively adequate when it comes to sharpness and at $ it's not a huge gamble. A little softer than I would like with a little too much noise. It's definitely hard to focus and not a real user-friendly lens.
Excerpt: Fairly giant, didn't seem much different from the 17mm canon FD I was using in terms of FOV. Definitely has nice image quality, though it didn't wow me. Focusing was what you would expect for all manual, not sure why there are no distance scale / depth of field scale on it. For the price I think it is lovely, but it isn't meeting my needs so will suck it up and get the 16-35.
Excerpt: Only used this for one afternoon at Lake Tahoe with some friends, so not the best opportunity to shoot but it is a wonderful location that lends itself to extremely wide field of view. Images seem very sharp and manual focus on a mirrorless A7II is not particularly hard given how wide it is with focus peeking and magnification.
Pros: Consistent Output, Durable, Strong Construction
Excerpt: This lens is super wide and sharp. It takes really good pictures of entire interior rooms, and does really well with landscape photos. It is totally manual with no electronic connection to camera, but that didn't bother me at all. Really glad I got it before my vacation to Arizona.
Pros: Consistent Output, Durable, Rugged, Strong Construction