Well, it looks like I accidentally deleted my post trrying to correct a typo on my phone...
'I have an old RolleiFlex 2.8E and some 1970's East German Zeiss lenses that fit a Kiev-60 (a Russian camera that takes Pentacon (not Pentagon ) mount lenses). I also used to shoot using the 35mm Canon EOS system. I have a ton of slides and negatives for both 35mm and 2 1/4 that I'd like to digitize one of these days. I was less than impressed trying to scan 2 1/4 stuff using an Epson flatbed scanner with light lid 20 or more years ago (1200 dpi resolution IIRC).'