Originally Posted by al Asaad

Only if the camera body is in "P", "S" and/or other program/dummie modes. In full manual mode, ("M") or Aperture priority "(A") mode, the aperture is locked and does not move as the zoom factor changes.
In your/my Evolt cameras, when the body is in "M" or "A" mode, there is no active electical connection to the aperture mechanisms thus no activity.

When I (or anyone) use an adapter on my Evolt bodies (E500 & E510) to mount Pentax "K" mount lenses for example, there is utterly NO CONNECTION to the body at all.
That is: without a physical/electric (contact) connection, such a lens or its aperture CANNOT move (by definition) On a 4/3rds body, the focal length of any mounted lens is double the stated focal length: so my Vivitar Series 1 (62mm filter) 70-210mm Canon FD lens becomes a 140-420mm lens on my Evolt 500.