Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)
Good point. I've dug around some and though they're very similar, there are minor differences so I've made note of it above, thanks.
According to Leica, the designs are indeed very close (6/4 double gauss construction), but Leica shows different MTF curves and distortion for the M (more uniform resolution but not quite as high stopped-down central resolution as the R; max ~0.25% distortion vs. ~1% for the R; a miniscule bit more vignetting for the M).