[0.625 lb] This adapter is meeting my every need for using my prime Nikon lenses on a GH4. The quality of the glass is very good and it twists on and off but maintains a snug fit without any lens wobble. 5 stars for price to quality considerations.

[4.1 x 4 x 2.6"] Works really well with my 3 old Nikon lenses, especially the 50mm, f/1.4, which has become my daily walk-around lens. I picked this adapter because it retains the lens' native focal length and +1 stop on aperture. Image results are sharp enough. Of course, you will have to focus manually, but you can still use Sony's A, P, and Superior Auto modes where the camera will do the rest. Note: this adapter doesn't have an aperture ring, so if your lens doesn't have it, you'll default to shooting at the widest aperture all the time. Overall, I'm really happy with this adapter.

[0.625 lb] This lens accessory is an amazing addition to any camera lens kit. I use it with old legacy lenses and it has turned my 50 1.8 into an oh my goodness killer camera lens combination. Well packaged and high quality build. You will not be dissapointed and it will give you an immediate edge without spending thousands on thta next lens.

[0.625 lb] I bought this in the hope of being able to adapt Nikkor Lenses on my Panasonic G7 and gain almost a stop in aperture. All that happens, so everything is fine. Attaching the adapter on the G7 is very smooth and easy and attaching the lens on the adapter is also smooth and easy, so everything works as advertised.

[4.1 x 4 x 2.6"] I've been using this adapter with some old 70's era Nikkor manual lenses on a Sony a6500 body. Nikkor 35mm f1.4, 85mm f1.8 and 200mm f1.4. These are all non AI* lenses. Be aware this adapter is different than the competition in that it doesn't have an apature ring built in so you need to use manual Nikon lenses with their own focus and aperture controls. The combination of these great manual lenses , with the ability of the 6500 electric view finder with live view manual focus zoom in allows you to get great focused shots easily at wide open aperture. Great adapter to add cheap, fun, stylistic, high quality glass to my setup.

[Nikon Z] It's a good alternative to the expensive brand. I use rokinon cine lenses nikon mount and this adapter is for manual lenses only so it works great with my lenses. Just did a small test run, will be doing a real test shoot soon this weekend!

[4.1 x 4 x 2.6"] Easy to use, sharp as a tack. I bought this adaptor to work with my Sony Alpha 6000. It allow me to use F-Mount and AIS Mount Nikkor lenses at their intended focal length with the added bonus of an extra stop of light gathering ability. All the lenses (including a Tamron macro) fit nicely on the adaptor and take crystal clear shots. I strongly recommend this product.

[4.1 x 4 x 2.6"] Bought this adapter for my GH4 as I couldn't afford the speedbooster version. Works perfectly with all of my nikon mount lenses. The fit on the body is slightly loose but I still feel it's very solid. The fit on the lens is very tight. Does what is advertised for a fraction of the cost of a speedbooster. If you need a focal reducer for the nikon mount, this is the one to get!

[4.1 x 4 x 2.6"] This device gives new life to all my old Canon FD lenses, making them work on my Sony E-mount camera. AND, not only do I get the full benefit of no-crop-factor focal length (which is to say that my 17mm lens is still a very wide angle instead effectively 26mm), I GAIN a full stop of additional light on the sensor, so it goes from being an f4 to an f2.8! Importantly, it does all this without giving up image quality. What's not to like?

[4.1 x 4 x 2.6"] I bought this adaptor to make my Sony Alpha 6000 a little more interesting. It is a little tricky to attach this to FD lenses, but once you get the hang of it the results are superb. I am using a 50mm f1.4 and a 15mm fisheye with the adaptor. The fisheye has a even exposure to the edges, something that surprised me. The 50mm is effectively working at f 1.0. I have no trouble focusing rapidly with focus peaking and the viewfinder is astounding to look through at night. I can see better through the camera than without it. Working shutter speeds and tack sharp images make this one of my favorite purchases to date. I also bought the Nikon F-mount version and am impresses with the optical properties of both adaptors.