Hi all,

I'm new to mu-43 and recently purchased a DMC-G3. I also picked up the Fotodiox M43 to FD adapter to use with some old lenses I had lying around. Some of the lenses are easy to mount to the adapter, but others I really have to finagle around to get them mounted. Does the position of the aperture ring on the lens have anything to do with this? It appears to be easier to mount them when I turn this ring to the largest aperture.

Gildon

I'm finding lens-to-lens differences. Some are really tough, others no problem. Have not noticed aperture ring affecting it, but I'll pay more attention next time.

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..... Mike .....
-GF1, GH2, E-PL1, 20mm f/1.7, 14-45mm, 45-200mm , OM 14-42mm
-Hexanon 40mm f1.8, Minolta 50mm f1.4, Pentax 50mm f1.4, plus "full frame" Graflex 4x5

I JUST learned this myself playing with my 50mm 1.8... there is a little pin inside of the bayonet mount on some lenses, that if in "A" mode, will not let you put the lens on. By turning the aperture ring from "A", it retracts this pin, allowing you to mount the lens. I believe this is to allow you to use the "Auto" aperture lenses with older cameras that don't support through the lens metering.

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Olympus E-PL1

• basic Olympus 14-42mm f3.5-5.6, Canon FD 24mm f2.8 SSC, Canon FD 50mm f1.8, Canon FD 135mm f2.5 SC, Canon FD compatible Macro Bellows (with reversing ring), 70-200mm f2.8L Canon EOS, 17-35mm f3.5 Canon EOS, 50mm f1.8 Canon EOS, 50mm f2.5 Macro Canon EOS, Meade 4500 Telescope (910mm F8)

Numerous Film based Cameras

Ah, that explains it then. I remember seeing that little pin the first time I had issues. Thanks for clearing up the mystery! :-)

It's not so much a feature to allow you to use the FD lenses on older bodies as it is a safety feature to keep you from getting into trouble (read: meter delivering the wrong exposure) by setting the A position when the lens is attached to a body that doesn't support metering modes where the body sets the f/stop (read: shutter priority and/or program automatic).