yes the CL accepts M lenses many have been stripped of their lens

the 40mm Voightlander is cheaper available single or multi coated and a stop faster, a generation later from the glass catalogue as well

except early wides like super angelon and Elmarit 28mm type I, collapsibles and some LTM lenses like J12 all of which will cause mechanical damage.

the rangefinder has a limited base length so fast longs difficult to nail focus.