Really well made and so very fine as a design item. Works really well. Fits really well. The only weakness is the glossy internal black finish that reflects some light sometimes and creates glare in some images. Paint your barrel internal shaft matt black K&F! C'mon! I spray painted the internals after taking it apart. It only takes 30 minutes. Taking into account a top quality adapter tears your money for over £100 this is a very good adapter if you are able to paint the insides. And it is incredibly heavy, but it feels superb.
08.05.2020
I was surprised with the build quality of this adapter, it being very good!However, I use a Fujinon 55mm f/1.8 manual lens with this on a Sony A6500, and I cannot focus to infinity.This is because the adapter needs to hold the lens ever-so-slightly closer to the sensor.I know it is not a problem with the lens as it focuses to infinity just fine on my actual M42 mount film camera.Any focus closer than infinity works just fine, it's just a little frustrating that I can't use this for landscape / long shots.
28.06.2019
The adaptor itself seems to work fine. I've used it with lenses like the Helios 44M 58mm and Helios 28mm wide-angle with much success. However after shooting with it for several days, I've noticed maybe a dozen fine metal particles covering my A7ii's sensor. I can't be certain whether the particles came from a lens or the adaptor itself, but it might be a good idea to leave one of these adaptors on each M42 lens you have, or purchase a more expensive one that won't wear.
03.05.2018
Excellent adapter, does exactly as it should. I can now use my selection of M42 lenses on the Sony A7ii the way they should be used.
11.02.2018
Works perfectly! Many people are frustrated saying that the threads do not line up, or that this adapter will not work with Super Takumar lenses because of the lip. Well, it worked just fine for me!Vintage lenses are such a blast to shoot with, and this adapter is a great (minuscule) investment. The build quality is excellent, and it attaches very securely. A must-have for any Intermediate/Advanced user.Link: K&F Concept Lens Mount Adapter M42 Lens to Sony NEX E-Mount Camera for Sony Alpha NEX-7 NEX-6 NEX-5N NEX-5 NEX-C3 NEX-3
07.02.2018