Review on 📸 Enhance Your Nikon Digital SLR Camera with the Rokinon 135mm F2.0 ED UMC Telephoto Lens by Lisa Barber

I bought this lens in February 2015 and paired it with an Olympus OMD E-M5. My first thoughts were to take advantage of the CMOS sensor that adapts the lens to the 270mm equivalent and use it for birding, but after playing around with the lens I have a few reservations which I will describe . The lens is made of metal, glass and durable modern high-impact polymer. There is nothing "plastic" in it. Focusing is manual and is smooth, well-damped and firm. Focusing isn't done by moving a finger along the barrel, it requires a significant amount of effort to turn (this may improve or loosen over time). The focus button is made of knurled rubber. In the range from F2 to F22, the aperture ring has an easy game. I like that the ring has MFT markings to indicate the camera platform. The EM-5 mount has some play. The lens comes with a case and a decent bayonet mount. The lens weighs an ounce or two under 2 pounds and protrudes 6 inches from the camera, resulting in the EM-5's bulky ergonomics. Front balance is improved with the addition of a grip and battery pack. I would suggest that ergonomics have also improved on the Oly EM-1. I also mounted the lens on an Oly Pen EP-2 for fun, resulting in a ridiculously heavy front platform. For the EM-5, be sure to set the Image Stabilizer on the 135mm lens. The lens is not chipped for electronic contact with Olya (there is a version with a Nikon mount). I set the settings to aperture priority (manual setting also works). The lens has 9 rounded blades, giving it a nearly circular aperture and producing great creamy bokeh when the aperture is wide open. I wasn't really into portrait composition, but I expect this lens to do the job. I see very little chromatic aberration. The shine is noticeable (although I won't be shooting in the sun). The lens is sharp wide open and seems to improve/optimize it by 5.6. I did not make detailed comparisons. The lens is an enigma as it defeats the hidden aesthetic of the u4/3 platform and I don't know why anyone would buy it for a DSLR given the sheer volume of amazing specs. Vintage glass is available for less than $600. Pros: - Good build quality, comparable to old Nikon glass from the 70's or 80's. Reminds me of Cosina Voightlander products. Smooth manual focus with good damping. Great bokeh. Ability to capture very clear images, especially on Olympus' stabilized 5-axis platform. $550-600. I bought the Rokinon version. - Difficult. Almost 2 pounds. - Some play between lens and camera mount. - Some play in the membrane ring. - The lens focuses at infinity, but the tube does not reach the mark that indicates infinity. Minor auto balance adjustments.