Reviews
Excellente
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.
09/10/2024