My intention is to use my OM1 for tripod work. I read that a big vibration offender for OM's is the aperture stop-down mechanism which initiates right before the shutter goes off, regardless if MLU is used. Anyone notice this to be a problem? Well, i guess it depends on my demands.. I'm interested mostly in 28mm-100mm focal lengths and the longest shutter speed would probably be 1/8s. This is for available light portraits, so not that high of a magnification.