The Elan 7, 7e, 7N, 7Ne (EOS 30/33 and 30V/33V) don't seem to meter accurately with adapters and non-EF lenses.

My Elan IIe (EOS 50) and Rebel 2000 (EOS 300) bodies do meter well with adapters and my OM Zuiko lenses.

They all require that you use stop-down metering.