Quite out of the blue, Leica announced these two products at the 100 year celebrations at Wetzlar. I think most people were taken unawares. The lens had been in development for a long time, I had a prototype version in 2013 for testing. The optical design of the lens was the same as the much loved older Macro Elmar, but with some functional refinements to match it with the adapter. In fact, I first spoke to Stefan Daniel and Jesko v. Oeynhausen about the idea of producing a helicoid adapter for M lenses a long time ago – during the early discussions about the M240 and Live View. The idea of being able to use any of the M lenses as a close up lens was very attractive to me (I’d had great results using a Hawks Bay adapter on a Sony NEX camera). I’ve had a lot of questions by email and on Forums and Facebook about both the lens and the adapter, and I think that probably it isn’t terribly well understood. So I thought it would be good to write this short article……

Source: www.l-camera-forum.com

L-Camera-Forum Leica Macro Adapher M Leica Macro Elmar 90mm f4