Topic: Zuiko 300mm f4.5 help needed.....
I have cleaned out my 300mm f4.5 Zuiko, which had contained some haze and dust. So far, so good.
However, there seems to be some looseness which allows movement of ~2mm between the part in front of and the part behind the aperture ring. I've taken some pics to show where the problem is to illustrate.
The looseness is between the aperture ring and the part to the right of it:
As you can see, the lens is mostly apart at this stage, and though it is generally simple, taking apart or tightening this section is puzzling me. Does anyone have any experience in taking this section apart. I have two theories:
1) the front element set needs to be screwed off - I tried unscrewing it wearing rubber gloves after removing the three grub screws, but it does not seem to budge.
2) the aperture assembly needs to be removed to gain access to the screws that fasten the fron and back together
Here's a pic of the front:
Here's a pic of the rear:
Since neither seems simple to remove, I'd like to pause and ask for assistance! Perhaps I am missing something.
Last edited by robertro (2009-05-16 19:40:03)
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