Tsai.

This is the thread which started the whole alternative 35mm adaptor thing off. P+S Technik's Mini35/Pro35 series were the initial benchmark The final evolutions of the alternative products were capable of coming up to or meeting 2K real world resolution if very carefully managed.

It would seem there is life in the old adaptor dog yet. A young guy has taken the "Coatwolf" camera setup a notch furthur. Interestingly, he has used a reflective relay arrangement rather than a translucent groundglass and compensated for the inevitable off-axis relay focus issue by using a tilt-shift lens. Modern DSLR cameras have a lot more sensitivity to play with to compensate for the savage light loss of this reflective arrangement.

https://www.youtube.com/watch?v=0ZixDTrQdzo&lc=z23vw5ajuyn0tryg004t1aokgxmydtariwhx3x1i3pavrk0h00410.1514928293732058