Does the job well, it seemed very well built, a quality product. I returned it though as the fit to the body wasn't quite as tight as I would've liked. Please bear in mind though I was being VERY picky and I wouldn't expect it to cause ANY problems.
14.01.2017
Originally I thought just the thread would be metal on this adaptor but the whole thing is metal. Fantastically built and works perfectly with my Carl Zeiss Jena lenses!
08.01.2017
Works as advertised. Fits the Fuji opening tight and easy to insert. Found that pictures are a bit darker and I have to raise up the exposure. I am using with Helios 44m-4 58 mm 1.2. Focus is great but manual of course.
18.11.2016
I ordered the K&F M42 to Fuji FX adapter not knowing whether it would work well with the old Helios and Jupiter lenses I was hoping to use. It works perfectly!The adapter's an all metal build and feels well made and sturdy. It fits snuggly with the lens and the body of the camera (in my case the Fuji X-T10), there's no wiggle or movement once mounted.The adapter has a removable flange for those lenses that have an aperture pin that needs pressing in order to shoot anything but wide open. No need to modify the lenses to keep the pin pressed which is great! I didn't see any reviews that mentioned the flange, so was extremely happy to discover it was there.I haven't had any issues with focus to infinity using the adapter on any of the M42 lenses I've tried. They all appear to work perfectly.Obviously all lenses will be manual focus only, but if you're buying one of these adapters I'd expect you already know that. Set the camera to shoot without lens, and switch the focal lenth to that of your lens and you're off! Focus peaking also works a treat with these older lenses.
02.11.2016
Mount adapter works fine on my X-T1. Seems very well made, and fits just like a Fuji lens mount--no tightness or difficulty in mounting, unlike one or two other reviews. I'm pleased and the price could not have been better. One benefit I had not expected is that I can use my old Pentax screw mount prime lenses as well. Those were some very nice lenses that have gotten minimal use in the digital age.
31.07.2016
If you have some older lenses kicking around (M42 threaded with 1mm pitch (M42x1), They will fit right into this adapter and you will have lots of fun with your x mount Fuji camera!. Adapter is quality made steel and unlike other aluminum/powder coated ones, this will not gouge/score your camera mount. Your lens must have it's own aperture ring. Some lenses may have a "pin" stick out, which needs to be depressed in order to work (for the aperture), be glad, this adapter has a shoulder built just below the threads inside, and, it will do the job!
12.05.2016