I'm sitting here with a Bessa-L with 21mm f:4 lens in front of me...

The L is made for wide lenses, so it has no rangefinder. The 21mm lens however is rangefinder coupled, in case you wish to se it on a rangefinder camera. I have tried it on a FED-2 just to check. But you would need the auxiliary viewfinder anyway. The shorter lenses are not rangefinder coupled.

I was out shooting IR film with the Bessa-L yesterday, focus is not a problem when everything from 1m to infinity is sharp at f:8.