Excerpt: I got this Samyang 85mm f1.4 in Pentax mount. There is A position on aperture ring so this lens works in aperture priority mode very nice. Didn't try other modes as I use them seldom. It meters correctly and exposures are perfect. You can change aperture at the dial on camera body. Mine is Pentax K5 II. All you need to do with this lens is to focus it manually. Basically, your hand is motor for this lens.
Pros: Durable, Easily Interchangeable, Nice Bokeh, Rugged, Strong Construction
Excerpt: So we all now navigate by satnav, trusting our journey to the voice of our choice, well here you have a chance to get rewards for your own efforts. At first I found it frustrating to nail the focus but soon found a solution that works for me. On my Nikon D7100 I am already shooting 1.5 times focal length and find in hand hold, the focus confirm indicator fluctuating front to back focus.
Excerpt: Lens is manual, does not have stabilization; don't let this hold you back, the quality of the images are amazing if you take your time. Some chromatic aberration exists at f1.4, however it disappears at 1.6. Focus range on lens is smooth and adequate to make easy precise adjustments. Flickr also has a group solely dedicated to this lens, which says a lot. Using a macro adapter provided superior results as well.
Pros: Consistent Output, Durable, Nice Bokeh, Rugged, Strong Construction
Summary: lens purchased did not function properly in either the auto or manual mode on my nikon d5100. i'm thinking the lens was defective. i replaced it with the supposedly identical rokinon lens which has worked flawlessly in both auto and manual. for those of you who don't understand, auto in this case means only aperture and shutter speed, you still must manually adjust the focus ring, you can't pick it up, put it on and shoot.
Excerpt: Awesome value if you can live without AF and deal with manual aperture. I use it on my Nikon D700 and my Fuji X-T1 with an adaptor. In both cases, it works flawlessly. The IQ is in the same league with my Nikkor 85 1.4D. I use it mainly for portraits so manual focus is not a big deal. It's very sharp wide open and gets better when you stop down.
Summary: It works nicely on my NIkon D5200. I paid more time on focusing because this is full manual lens. I think for a prime lens with the cheaper price and f1.4 there was no problem as i moved my legs instead of adjusting the lens itself completely.