What I love on modern digital cameras is that you are being offered with the ability to use almost any lenses ever existed for photo and cine film cameras. I have always been after the specific character of old lenses on film and now on digital this has became a more straightforward process, from taking a shot to viewing the result.
I am not making a comparison of new vs old, but for sure I am bored by the almost unrealistic perfection of the modern glass. There are also other things I hate with modern lenses, but that is another story.
Last weekend I had some great time with a MIR-10A lens mounted on my Fujifilm X-Pro1. I had an adapter for FD to FX plus one for M42 to FD. So I had used two adapters to get that M42 lens fitted on my mirrorless camera.
The MIR-10A is a 28mm f/3.5 with single coated optics and a star shaped aperture. It has been a bit of trivia for me to put it to good use and for sure I have a long way to go with it.