[Aluminum] Very nicely made adapter with proper fit to Leica SL series cameras. I purchased this to connect my SL2-S to an astronomical telescope focuser using a 2 nosepiece. What I learned upon receipt is the difference between M2 (1.0mm thread pitch) and T2 (.75mm thread pitch)... most astronomical fittings are T2 and will not attach properly to M42 without an M2-T2 adapter. These exist but are not easy to find. Fortunately I did source one and the adapter now works perfectly for my intended use.

[0.36 lb] At first ....I thought it was abit difficult, but in a short time I mastered the handling and the adapter smoothed out during it's use.
Now it's quicker and smoother to handle .
I'm pleased with this one.
Note: Used on a Fujifilm X-H1 with a Contax G lens adapter lens.

[0.36 lb] I am using this adapter on my M50 mark II to adapt a Pentax-M SMC f1.4 50mm lens. The adapter is well built, sturdy, and although the lens release lever feels a little stiff, has otherwise good ergonomics. Using a vintage lens has been a lot of fun, especially since my M50 had just been gathering dust after I acquired a much older, but better performing DSLR. Manual focus Pentax lenses especially can be found quite cheaply, and on the APS-C sensor of my camera perform exceptionally well under good conditions.

[0.36 lb] This is an excellent adapter. Very solid and well built and fits tightly... no wobbles of any sort.

2 errors from Urth on this adapter though: I have added photos highlighting this

1. On the Nikon Z teleconverter mount, there is a small notch in the adapter ring which is absent on the back side of the Urth adapter.

Therefore if you intend to use this adapter with Nikon Z teleconverter and Nikon F lens (Nikon's FTZ adapter cannot be used because the adapter hole does not allow the Z teleconverter protruding element to pass through); so if you intend to use this adapter with Z teleconverter, you will have to grind out the notch either in the teleconverter mount ring (not recommended) or grind a notch into the back side of the Urth adapter... recommended as it costs only 39$.

2. Additionally, Urth has unnecessarily put a very small screw on the back side of the adapter which also prevents it from screwing into the Nikon Z mount. We need to remove this screw as well.

Urth needs to made these 2 updates to their future adapter manufacturing runs.

I am now able to successfully use a Nikon Z camera plus Nikon Z teleconverter + Urth adapter and Nikon F lens in manual focus mode.

[0.36 lb] the unit is nicely made and the lens appears to lock up firmly.

unfortunately the infinity focus is off w/ some lenses.

it may be the case that the lenses i'm using are the problem

[0.36 lb] The Nikon F to Canon RF works if you have a lens with manual aperture adjustment. I bought it for the Zeiss Milvus 15mm lens and it works fine with it.

[0.36 lb] At the time of purchasing this product (and as I write this) there was only one review (which gave it 1 star). I feel somewhat compelled to balance that out. I'm using it with two older f-mount lenses (Nikon & Tamron) and they both work great! They fit incredibly well with a solid connection and I have no complaints whatsoever with this product. It does it exactly what it's supposed to do, and it seems to be made to last. Enjoy!

[FUJIFILM X] Used the adapter to couple my canon FD 1.8 with my canon m6. Followed the instructions on the Urth website and was able to use it right away. Felt like going back to the 80s when I had an AE-1 with the same lens and film :-)

[Aluminum] Vello M42 Lens to Fujifilm X-Mount Camera Lens Adapter

Feels solid and the fits are great without significant play. It is simply a connector, no electronic communication, so all lens functions are manual.
I plan to use the adapter on my XT-2.

[0.36 lb] This lens mount adapter will certainly get the job done. Don't waste money on the more expensive ones. Just make sure on your EOS-M camera to go to MENU Function settings (tab 5) Custom Functions (C.Fn) and select Enable for release shutter w/o lens. This is how the camera will allow you to take pictures with the Pentax lenses.