Summary: I would like to start out by saying the quality of the lens is great however in the description it said that it had a focus sensor and it did not. When I receive a product I want it as described.
Summary: For a fast, manual focusing prime lens, I'd give a properly functioning copy 5 stars. However, my copy had focusing issues. This copy had two 'focusing issues'. First, this lens has a 'chip' that recognizes when your subject is in focus and indicates as much in the viewfinder. Snap a photo when the indicator says your subject is in focus and the resulting image will be slightly out of focus. This was an issue at all apertures.
Summary: Rokinon 35mm 1.4 UMC Wide Angle Lens for Nikon is an excellent Lens. I am amazed by it's clarity and sharpness...right down to 1.4. Crystal Clear. A better lens than Nikon's 35mm 1.4 G and Cheaper. Lot's Cheaper..and better Results. Highly Recommended.
Summary: I would have loved to use this Rokinon, as I have heard great reviews. However I have a Nikon D5200 which is a cropped camera, not a full camera. Although it fits on a Nikon, the camera no longer makes this a wide angle lens. Everything else worked great, the lens was solidly built, great glass, but the field of view is changed by a APS-C sensor. I would recommend researching lens that actually say, for APS-C cameras, rather then 'it fits'..
Summary: This really is a great lens. This is my third Rokinon lens and I know I made the right choice in getting the 35. It's super sharp, but it's pretty hard to focus wide open unless stabilized. It's very nifty to be able to control the aperture by the wheel instead of having to use the ring on the lens. If you have a full frame camera and don't have the money for a Sigma 35mm 1.4 or the Nikkor 35mm 1.4, I would say skip the 35mm f/2 nikkor and get this.
Summary: I have old Nikkor 35mm f2.0 and f2.8 lenses. On my D7000 this Rokinon is much better in all areas of the image, especially the corners. There is very little chromatic aberration. If there is some barrel distortion present it is not enough to be noticeable in interior architecture shots. The focus is perhaps a little heavy, but very smooth and it stays where you put it without creeping even when the camera is pointed down..
Summary: Sharp at F1.4 but has significant color fringes. These will be very visible with high contrast subjects. Excellent results at F2. Used on D7100. The only way to accurately focus at F1.4 is to use live mode and magnify the image. Of course this is not the fault of the lens.