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70 - 200 IS II - Loose rear section

Jul 18, 2014
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I just got back from a trip (involving many flights, vehicles, etc)..so lots of scope for vibration....

Was cleaning equipment and notice that the rear section (the section that the tripod collar mounts on), had some play.

On further investigation, a number of the small screws that seem to hold this section in place had come loose.

I was easily able to re-tighten these and everything seems OK now, but was wondering if

- anyone had similar issues?
- Is re-tightening ok - should I apply some Loctite?
- Shouldn't there have been Loctite anyway to stop this