Hello. My Olympus Pen has started acting up. The shutter opens correctly, but when it closes, it closes only half-way, then pauses, and closes the rest of the way very slowly. I have tried dripping some lighter fluid on it (it is directly accesible from the back) but this only helps a little, and only until it evaporates.

Do you think I have to disassemble the lens, and look for a weak spring, a greasy shutter blade hinge or something?

I would rather take it to a pro repairman than mess it up myself, but I do not feel it is worth the cost.

The camera is the model with the 2.8cm f/3.5 lens, and it says Copal-X on the bottom, that must be the shutter type?

Thank you for any kind of feedback on this