I've been packing Olympus SLR's since the FTL (precursor to the OM system) my main body is OM-1 have an OM-4 and had in the past OM-10's and OM-2's, not to mention XA and XA-2. I prefer the full manual OM-1, tho I'd kill for an OM-3. The FTL used M-42 lenses.