TL;DR Best Lenses

(Taken from Richard's post in Digital Film Scan Tools https://www.facebook.com/groups/636106623818601 )

Here is what Richard Karash ( https://www.facebook.com/richard.karash ), authority on lenses for camera scanning has to say:

I have tested a lot of lenses at 1x; here are the best in resolution & contrast at 1x toa 50MPx sensor:

Top shelf
50mm f/2.8 Sigma EX DG macro

50mm f/4.5 Tominon

55mm f/2.8 Micro-Nikkor AI or AIS

70mm f/2.8 Sigma Macro ART

75mm f/4 APO Rodagon-D 1x Copy Lens

75mm f/4.5 APO Rodagon-D 2x Copy Lens, Normal Orientation

90mm f/2.8 Sony Macro

Next Tier
And here is the next tier, a little less in tests, you won't see a difference in actual cam-scan results:

50mm f/3.5 Canon FD Macro

60mm f/2.8 Micro-Nikkor AF

75mm f/4.5 Enlarging Ektar

80mm f/4 Olympus Bellows Macro

80mm f/4 APO Rodagon-N

80mm f/5.6 Rodagon Fixed Aperture

80mm f/5.6 Componon

80mm f/4 Componon-S

90mm f/2.5 Vivitar Macro w/1x Extender

105mm f/2.8 Micro-Nikkor AF-D, with manual focus on Sony

Conclusion
All the above will produce excellent cam-scans at 1x at 50MPx and lower. Have not tested anything at higher resolutions (e.g. Pixel Shift).

Test conditions: USAF 1951 Glass target, well away from center, at 1x to a 50MPx sensor, careful manual focus, flash illumination.


 * 1) BestLenses

Hope this is helpful.