Still shooting an SL 601, had it since it came out. Shoot with the 24-90 but much prefer the lighter package of SL with Zeiss ZM lenses. I just put an old Nikon F mount 28-70D lens on the SL and it is a lovely light weight combo! Manual focus of course but that’s fine, rendering is nice if total sharpness is not up to modern lens standard. But it is a slow lens so looking for recommendations of lightweight zoom, in the 28-70 range, with a decent max aperture, that can be adapted to the SL. Any suggestions pls? Thanks.