Hi all - I recently acquired an Olympus OM-2000 with a 28mm Hanimex lens. The shutter seems to work fine on apertures f/8 and above. When I try to use 2.8, 4, and 5.6 (the first three available on the lens) the shutter will not release correctly. With the lens off the shutter release is fine. I know this is cheap equipment, but is it just the lens or the camera that has the problem? Sorry if this is a newb question - I would like to use this camera, is it worth trying to get another lens for it? I've tried googling, but no luck. I don't really even know what to google for. Thanks in advance for any assistance.