Summary: A friend recommended that I purchased a 85mm and I went and read several reviews online and for the price and quality, just made sense. I'm stuck squarely in CANON corner, but I'm extremely happy with this purchase. Some may think that the lack of auto functionality is a show stopper, but I'm very pleased with the pic and ease of use.
Summary: Sharper than Canon's EF 85mm F1.8, faster aperture, and controls CA/Fringe nicely for it's cost. Excellent portrait lens on full frame. I prefer manual everything here anyways, when working with depth of field this thin, autofocus cannot be trusted. For $280, this lens performs like L glass, just without the fancy autofocus abilities. You don't buy this lens to be used at anything other than F1.4. If you stop it down, you might as well get another lens. Excellent optics.
Summary: This samyang lens is almost perfect. How I wish there's an AF, but you can't ask for more because of the quality of image it produces. In my own opinion this is a lens you would want to use only for video, for photo I think it's okay as long as you don't mind the time or you're on a studio with a tripod. It really has a long learning curve to master this lens. F1.4 quality is very very nice. TACT SHARP as they say. The bokeh is lovely.
Amazing image quality and build quality for this price!
9 February 2014
Summary: I purchased the Canon mount version for my Canon 6d and 5d Classic (Both are Full Frame bodies). Let me start by getting this lense's few bad bits out of the way.: 1) It is manual focus. This is neither good nor bad... It just "IS!" but this is the biggest thing to keep in mind. To me, manual focus is akin to a manual shift in an expensive Sports Car. Yes, it is true you could buy an automatic Carvette, Ferrari or Porsche... but Why?
Summary: It works as advertised. Good = you can shoot in low lights, and it's cheap. Bad = it's very hard to focus accurately at F/1.4. I had to put camera on a tripod and magnify LCD display to focus perfectly. This is a luxury you don't have on the go. The auto focus models would cost $600 more. You get what you paid for? You won't have this problem if you shoot at F4. It's a nice tory.