Bought to mount a 1967 Pentax Super Takumar 50mm f/1.4 on a Sony A7sIII. Works perfectly and seems to be very solid. With M42 mount lenses you have to, if necessary, align the lens by loosening and then tightening the 4 adapter screws, with a key that comes with it.
13/11/2025
bought this to use on a couple of vintage lenses I had sitting around. I've used it on my Sony A7IV and have had no problems. The build quality is great, and it opens up a whole other aesthetic to explore, which for the price is fantastic.
12/11/2025
Compared to other adapters from other brands, this is an excellent product. It is very robust and well built. It fits perfectly without any gaps, which is something worth highlighting. In my opinion, it is the best adapter I have ever used. purchased so far. I am not giving it a five star rating (although it deserves it) because I have the feeling that the item has already been used before. It is just my perception. I am posting some photos where signs of use can be seen.
08/11/2025
Tested on Sony A7C body, attached to Helios 44-2 lens. No issues or light leaks; works perfectly. Maybe a little pricey for a simple screw-on element but it is sturdy and attaches securely to the E-mount - luckily I was able to take advantage of a 10% discount on purchase.
08/11/2025
Fast delivered ( 1 day in advance ) but... Item sold for £30 and you receive a used item.... Full of scratches... Updated The seller sent me the replacement Good quality and fits perfectly
02/11/2025
The products are very economical and have the credo that they are sure to ensure that the products come as long as possible, robust and lightweight at a steady pace
31/10/2025
As you can see in the pictures, the perfect combination. (Helios and Sony) Very high quality workmanship, nice look, the thread runs nice and smoothly. It is for purely manual objects. Thank you very much
30/10/2025
The adapter is well made and looks good with the red ring. It fits perfectly. Nothing wobbles. With my lenses from my internships back in the day. Mounted on the Sony Zv-e10. The first test photos are already promising.
24/10/2025
perfectly machined ring that respects the dimensions related to the camera. I have a Sony A7III, the flange length is 18 mm. In M42 mount, the flange length is 45.46 mm. The adapter must therefore measure 45.46 mm - 18 mm = 27.46 mm. Measuring with the caliper of my M42 K&F ring is 27.42 mm. We are almost perfect. It is slightly shorter than it should be (-0.04 mm) but this allows you to reach infinity without any problem. I did the same calculations and measurements for the Sony A7III and the K&F ring for Minolta MC or MD, the ring must be 25.5 mm. Measurement taken, this is the dimension of my K&F ring ... Bravo! On the other hand, I bought Fotga rings, there are 0.35 mm TOO MUCH! (in M42) so infinity is impossible to reach. Same observation for this brand with rings for Minolta and especially Konica (where the inaccuracy is much greater). It is true that the K&F, especially the new ones, are bigger and heavier than the competition, but that is the price of accuracy.
10/10/2025