| Joined: | Thu Feb 7th, 2019 |
| Location: | Leigh On Sea, Essex , United Kingdom |
| Posts: | 1320 |
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and yes he does cover the 105 micro lens in detail.Fortunately I have a set of instrument screwdrivers and last night I stripped the 105 down to the rear set of helicoids and they are totally devoid of grease, just a black stickyness in the threads..... so I have ordered a small pot of 10 weight helicoid grease.
After cleaning, the rear helicoids are moving very freely, I expect to find the front helicoids in the same state, but I will leave them for now until I have the grease to reassemble the rear ones - I don't like leaving things with too many pieces apart!
The lens has clearly been apart in the past, none of the rings are sealed with lacquer and the front ring grub screw is missing. I will reassemble with a little weak bond Loctite when I am finished.
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If it is broken it was probably me ....