[Canon EF] The Redrock Micro Nikon to Canon EF Adapter allows you to connect Nikon lenses to your Canon EOS camera (in this case, the camera I was using was the t3i). As I had many old Nikon lenses that were not in use, I decided to purchase an adapter. My immediate concern was that it would not fit, but upon receiving it, my worries soon dissolved as I attached the adapter. It fits perfectly on my lenses and there is no wiggle when focusing or zooming (even on my heavy Quantaray zoom lens), which is crucial for shooting video. Because the adapter requires very tiny screws and can be mildly challenging to attach, I recommend purchasing one adapter per lens. This way, you won't need to worry about removing and re-attaching the adapter to a new lens, or losing screws in the process (on that note, be sure not to lose any screws, as the adapter does not come with any replacements). All in all, this is an excellent product with good construction and excellent value. it is also one of the most affordable adapters I have seen. If you already have good Nikon lenses, this will save you potentially hundreds of dollars by allowing you to use Nikon Lenses with your Canon cameras. Happy shooting!

[Canon EF] Have purchased several different lens adaptors - all are pretty poor - Some don't like going on Canon C100 / C300 sometimes - or they don't focus to infinity as the adaptors are too thick - and the lens always moves when u change focus... This RedRock Micro one screws onto the lens... is thin so I'm sure will focus to infinity - doesnt really move once on the lens (still a tiny bit of movement) but more solid than others - doesnt move the lens when u turn focus barrel - its the best adaptor I've seen for the price - only thing that might be better is the $ adaptor - i think this is the best buy

[Canon EF] I used 4 of these to update a set of Zeiss Milvus ZF lenses to EF mount. I went with the ZFs over the ZEs for the manual iris control and when attached correctly, these adapters feel as solid as a native EF mount.

On some lenses like the Milvus, the iris pull will become difficult if you tighten them down too much.

[0.13 lb] This is the ONLY adapter out there that has zero play between it and every lens. Even my $200 Nova adapter has play. This is the only adapter I would ever suggest for video use, because play when shooting video results in jarring video shift that is just plain ugly.

[Canon EF] In simple, it fits nice and snug and my Nikon Nikkor f/2.0 AI lens. I've used it so far on my Canon t2i and my Canon C100 Mark 1. Fantastic. It was easy to install, just need some patience since the screws are tiny so do this in a secure area. A tip.. I would apply the screw onto the Allen key with the key facing up, then it'll stay in place as you turn it down and guide it into the hole to mount. I didn't need any tweezers. Everything you need is provided. Real simple, no taking anything apart. I wish they provided/sold spare screws just in case. But I'm sure a substitute can be found somewhere in the world. I cannot wait to expand my lens kit.

[0.13 lb] I bought an Canon EF mount adapter for my Nikon lens so that I could use it on my Canon C100 and 60D or video. My old adapter was made by Bower and it had a lot of play which I hated. When I saw the Red Rock Micro adapter I though... I'll give it a shot since they make some great gear. I wasn't disappointed. There are 4 very small allen head screws that come with the adapter to lock it onto the lens. The micro allen wrench also comes with it. You snug then down and are good to go. No sloppy play! I plan to look for more Nikkor lenses and use these adapters. Get one!

[Canon EF] Its solid. Its at the right price. Two of my favorite qualities

[Canon EF] This was a no-brainer for turning an old Nikkor 50mm f1.8 into a pivotal lens for night shooting on my canon rebel. Great quality. Low price.

[0.13 lb] Ive been using a cheap adaptor from eBay for too many years. Finally decided to get these for my Zeiss prime lenses, which have a Nikon mount. These are rock solid and dont have any play in them like the cheap adaptor did. They go on my EVA1 nicely.
Cant wait to use these on an upcoming project!

[0.13 lb] So far my 80-200mm is rock solid on this mount. It didn't take too long for my other mount to start getting loose on that lens. I don't mind the tiny screws if it keeps things tight. Highly recommended.