Fotodiox Lens Mount Adapter - Compatible with Nikon F Mount D/SLR Lenses to fit Canon EF & EF-S Mount SLR Cameras

Works like a charm on a RED cinema camera. I have the A-EF and the MD-EF adapters. Both of these adapters introduce new optics in order to make up for the flange distance issue (which would otherwise render the lenses unusable on EF.) The adapter optics introduce a touch of new character to the lenses. They introduce softness, highlight bloom, and halation when wide open. If you stop down a touch, they sharpen up while holding onto a tasteful dash of that character. The image is in my opinion very nice looking, and I might no longer consider using a filter in front of the lens to attain a similar effect. The character and overall look is in my opinion still clean enough to use on commercial work.

This is truly an amazing product at a more amazing price. If you look around here in the nikon to eos adapters you can find insane prices such as the NOVOFLEX brand, I've used one before when working on a production and I really wasn't that amazed, it actually was harder to take off the lenses than these Fotodiox mounts are.I understand that there is a fear that these have a fragile clasp that actually holds the adapter to the lens and I somewhat agree. I examined it an it really is just a simple flexing piece of metal (about the same thickness as a paperclip) so I am somewhat afraid of an eventual breakdown, but with careful opening (when possible) it will be okay, but I bought two and will probably buy more so that I can just leave the mounts onto the lenses to prevent possible damage to the clasp, and I recommend this as the best option.Now, when I bought the adapter I was reading reviews as to what they will adapter or if there was any sort of issue I would face. Someone said that they won't accurately mount to a 28mm lens or wider and this is incorrect. I mounted it to my 28mm Nikkor lens and there is no issue of any kind, mainly because a Nikon mount is always a Nikon mount no matter the lens and an EOS body is always an EOS body no matter the model.I'll probably end up editing this and uploading a video review of the product.UPDATE:11-25-2012The adapters are still in tremendous shape in-spite of me purposely being rough with them, the "hinge" that connects the lens adapter to the lens is still performing like a champ. When I say rough, I mean rough, I've left the adapter loose with a some of my metal quick release plates in my bag and threw that around not a dent. I've done at least in the 1000's of lens changes with these adapters and not a single problem.Now, with that in mind for the metal clasp, I want to explain something that can be annoying about these adapters.They connect to the camera fine, but there is a little bit of "play / shake" that you can notice if you touch the lens independent of the camera body. This is a very minuscule amount of play that won't really effect anything, except for those who work with DSLR Video by manually focusing by the hand only (no follow focus).For shorter lenses the shake is not noticeable on the final video, but with a longer lens (70-200mm) it can be slightly noticeable on the final video. With that small shake in mind, I simply prepare for it, by gently grabbing the lens for focus changes, not a major problem at all.

This adapter suffers from a design flaw. I will get to in a minute which Nikon/EOS adapter to get.When I turn the focusing ring of a manual focus lens, or an autofocus lens functioning as a manual focus, I expect only the ring to move. With the Fotodiox there is excessive play (> 5 deg) between the lens and the adapter. When you turn the focusing ring with a Nikon AUTOfocus lens mounted, the lens will move first with respect to the adapter before the focusing ring does. I don't know about others but to me this is unacceptable. When I turn the focusing ring I expect only the ring to move. With AI-S (manual focus) lenses, the play is a little less (about 2 degrees), but in both cases there is not just rotational play between the lens and adapter which is hugely annoying but will probably not affect the final image, even worse, there is also a tiny bit of play in the angle the optical axis makes with the image plane. This *does* affect image quality as I have verified. Think 'view camera' where the plane of focus is not parallel to the image plane (sensor). At first I couldn't explain the loss of sharpness even with a stellar Nikon lens like the 17-35/2.8 on my 5d, but after some trial and error I pinned it down to misalignment between the focal plane and the sensor. This is simply not acceptable on any lens adapter regardless of cost.Now that we know what the flaw is, what to do? Well, it turns out are two generic Nikon/EOS adapter designs out there. Most importers (Fotodiox included) order these from China and put their own logo on it. I have an adapter *identical* to the Fotodiox that I got from eBay(tons of those out there) except it doesn't have the Fotodiox name. You can tell this design from the presence of a little black spring loaded lever that you press to unattach the lens from the adapter. This is the flawed design and the one to avoid.The other (costs about the same) has a little square tab with a hole in the middle which you push/pull to mount/ unmount the lens from the adapter. I own one of these as well. There is almost zero play with the lens mounted on this. It fits tightly and is a pleasure to focus with. This is the one to get. These are also plentifully available on eBay.Needless to say, my Fotodiox is going back to Amazon.