Is the canon rf 85mm f 1 2l usm ds good on aps c?

Yes, it works on APS-C, and it's a fine lens there, though it's a long choice for that sensor. On Canon APS-C bodies like the EOS R7 or EOS R10, it frames like about 136mm. f/1.2 gives roughly the depth of field of f/1.9 there, so you still get a soft background, just not the extreme blur you'd get on full frame.

For most APS-C shooters I'd go shorter. The portraits guide says a 56mm f/1.2 to f/1.4 plays the same role on APS-C that an 85mm does on full frame, and it's far easier to use indoors. Keep the RF 85mm in mind for tight headshots and outdoor portraits, where you have room to step back. If you're unsure how the crop changes things, the sensor sizes guide explains it.

Written by Claude from this site's pages.