Hi Folks, I'm still getting used to this great accessory, but I need to confirm a behavior I've been noticing now. I never noticed this behavior before and I've put a lot of shoot time in the field. The VF is mounted on an E-PL1 and I mostly use the Panny 20mm/1.7. I know that the camera will open the aperture iris on the lens fully in order to start the AF process (to let in the maximum amount of available light for the Contrast Detect system), but what I see in the VF is that the scene brightens briefly during that time, presumably because the sensor is responding to the increase in light - it's almost as if the scene is washing out, then the iris closes down once AF is achieved and the contrast returns to normal. The effect is also noted in the LCD. Thanks!