When putting an S lens on an SL (through the yet to be released adapter), how does that 'affect' (equivalent) focal length and maximum aperture?
When putting an 'APS-C lens' (e.g. T lens) on a full frame camera, one adds a crop factor of 1.5 and aperture remains unchanged. I would have expected with an S lens on the SL the reverse to happen (crop factor about 0.7 and aperture unchanged)? However, I saw a video of a Leica technical expert who claimed that if you put a 100mm 2.0 S lens on the SL, in effect you have a 100m/1.2 lens. That sounds a bit strange.
Anyone having any thoughts on this?