[0.29 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!

[0.29 lb] The Fotodiox adapter has much nicer finish and tighter tolerances than the cheap adapters available from China through @, yet it costs far less than the Leica or Voigtlander R to M adapers. There is absolutely no wobble when lenses are mounted, and I trust the latches not to fail. Great quality for a moderate price.

[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.

[Aluminum] I find these much more convenient than the plastic, spring loaded caps. they are a lot more expensive, but worth it in my estimation. I also use K&F concepts magnetic caps.

[0.29 lb] Got this to adapt my collection of Takumar lenses for my new S1H. This adapter feels perfectly sturdy and does what it was designed to do. Extra meaningful because it let me adapt lenses left from my late grandfather. Definitely the adapter to get for Leica L-mount cameras.

[Aluminum] 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.

[0.29 lb] Ready to sell a 50mm Sumicron, I decided to give this adapter a try on my J4 and J5. The Nikon zooms are outstanding but this is better clarity, contrast, color and detail. All! And f2. Yeah, sure, its all manual- but then it always was! The only practical limitation otherwise is the focusing on the screen; nudge, nudge as opposed to the instant lock-on with the M rangefinder. Do yourself a huge favor and don't sell your M glass until you try this bad boy on your 1. Superb build quality and utility for a pittance. Go B&H!