Hi - I just got my first legacy lens for my E-P1, a Canon FD 50mm f/1.4, and am still getting the hang of using it. First thing I'm noticing is that when I have the camera on Av, when I stop it down, the image on the LCD darkens - as I'd expect - and the auto-set shutter speed gets incrementally slower, but not nearly enough to compensate for the reduced light hitting the sensor. Unsurprisingly, when I shoot the resulting image is a lot darker even though the exposure compensation reads 0. The exposure appears correct when I shoot wide open. My understanding was that shooting in Av would result in the camera automatically adjusting itself to the manually-set aperture. Is that incorrect? Do I need to shoot in full manual and set the shutter speed myself? Assistance is appreciated.