Until yesterday I never considered using any of my 3 Adaptall lenses on the E-PL1. Used them on SLR and DSLR. However in a local camera shop picked up an Adaptall to OM adapter quite cheaply. Fits great and the lens aperture rings stop down ok. So another 3 to test... ok maybe 2 as the SP180mm f2.5 is a tad big and heavy for the E-PL1 !!