Hello everyone,
I have inherited an Olympus BX51WI microscope which I have used in the past. It is working normally except for one thing. I recently locked the pre-focus lock on the front of the microscope (see attached pictures) and now it is stuck in the locked position. I just can't get it unlocked without breaking it. Both fine and coarse focus works and everything is working well. Also this is not the first time I have locked the pre-focussing knob. It was working fine for a while. I don't hear any strange noises while the microscope is working.
Can any one help/have suggestions with this? Is there any way to troubleshoot this? Attaching a picture for reference.
Thank you!
Dear Archan Ganguly ,
I think the grease might got old and sticky over the years. You might want to try a hairdryer to warm up the pre-focus lock. That will hopefully loosen the grease. Than you should be able to open the lock again.
Additionally, I had that problem with some vintage film photography lenses. When the grease is prewarmed and you are able to move the lock. Try to lock an unlock it several times, that should distribute the grease better and the results (for locking and unlocking) for the next month should be better.
Best wishes
Soenke
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