bought the 46mm to use with the Leica Summilux 35 Asph Fle. In contrast to other filters, this one is slightly larger on the outside, so the lens hood no longer fits. I thought it would be good to know if anyone uses it with this lens. Other than that, it's a great filter!

bought three adapters with a Canon R mount (one for Leica R, one for Contax and one for Minolta MD). They all reach exactly infinity. The internal anti-reflective paint is well finished. When I check them with a caliber, the two sides of the adapters appear planar (but I don't have any wide-aperture lenses to test that on). On the camera side, they are all precise and without light leakage. On the optical side, I noticed a slight light infiltration on two adapters. Of course, I purposely searched for them by bringing a 500 lux LED flashlight half a centimeter away from the adapter. Light penetration is very unlikely in normal situations (perhaps on an easel on the beach in August). I solved it anyway with a small rubber grommet. If you're shooting freehand, that's not necessary, the hand is hiding a possible infiltration. Overall they look like good adapters to me. Due to their robustness, they can withstand lenses up to 600/700 grams. However, I would not mount lenses that are larger than one kg on the nose.

Used on Techart Pro (so not on the Leica system), very useful for adapting the M42 lenses to my Sony (the Techart Pro adapter has a Sony to Leica M connection). A bit expensive for a piece of metal, but at least it's not plastic, it looks good and isn't difficult to attach.

This adapter opens the lens of my Leica camera with a Canon lens

Compared to the Leica 2000b

Leica M ring

I ordered the filter to go with my Leica Q2, on which it fits perfectly, of course.

The filter has a very high quality finish and does justice to the Q2.

ND1000 I find already very nice for great effects such as an almost empty city hall market at noon.

From me there are 5 stars.

The Leica lenses fit perfectly on my xt20 the ring is very soft on both sides.. here is the one I received.