I have bought three FD-type lenses for my E-PM1 so far: 50mm f/1.4 SSC with breech lock mount, 28mm f/2.8 and 100-300mm f/5.6, both with bayonet mount. Got all from KEH.com. On the 50mm f/1.4 BL lens, I can adjust the aperture ring and see the aperture blades open or close. All is well. On the other two lenses, adjusting the aperture ring does nothing to the diaphragm blades. It's only when the lenses are mounted on the FD-to-m4/3 adapter, that I can adjust the aperture using the adapter's built-in open/lock aperture control ring. Is this how it's supposed to be? That unmounted, FDn lenses' aperture rings don't adjust the diaphragm blades as the FD(BL) lenses do? Here's my setup: (I know the aperture ring on the lens is set to "A", but I've tried it unlocked and all over the place) Thanks for any help.