Originally Posted by blumoon
Recently acquired an Olympus OM-system F. Zuiko Auto-T 300mm 4.5.
Got my tripod collar yesterday and took the lens out for a test run this morning.
I noticed that there is no adjustment to the aperture. I can hear something shaking around inside the bottom of the lens. I'm guessing a broken or detached spring?
How difficult would it be to take the bottom off and see what the problem is?
Has anyone had this problem?
Yes. Not on that exact lens, but on another Zuiko. The spring for the manual aperture change button is held in place by a plastic piece that has a post. On mine, the post had broken off. Taking the bottom off is simple. Just glue the post back in place with model airplane glue, get the spring in the correct position, and it is done.