75mm or 120mm apo rodegon for scanning?

[Harry]

This thread for example:

Help with 'scanning' setup

I’m looking at ‘scanning’ some 6x17’s (Velvia 50, Ektar 100, E100). I formally owned a Heidelberg Tango Drum Scanner which is considered the holy grail of digitising film. Unfortunately it stopped working and I ending up selling it for parts given there’s no-one in Australia to repair them. Given the above benchmark that I’m use to, I’m looking at the higher end of things. I currently have access to a Canon 5D MKIV, Fuji GFX 100s & Phase One IQ3 100mp. My preference would be to utilise the GFX …

or this, also from @cvandebroek:

Schneider APO 90mm f4.5 lens comparison

This thread is quite old, but I though it may still be useful to reply here The lenses are the same, just different mounts. The Pro version is fixed mounted into Novoflex’s bellow adapter, so you cannot remove it (I own that one too) while the Flex version requires the screw mount plate to be attached to the bellow system. The SK APO 90mm lens is great, while not specifically made for 1:1 repro, it still performs well on that scale (stopped down to f/7.1 - f/8). Though I’d advic…

“If you wish to use a less painful DoF, look out for the Rodenstock APO Rodagon 75mm 2x f/4.5. I strongly advice to go for the 2x version here, as the 1x version covers only up to 6x6 MF negatives while the 2x version has a super huge image circle and performs better in magnifications other than 1:1.”

Note that it seems that Schneider Kreuznach seem to ‘re-badge’ older lenses for the digital age so that you may or may not find that they are the same though named differently. Information is hard to get, are there subtle differences nonetheless? Who knows?