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Old 11-04-2007, 08:07 AM
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Starkler (Geoff)
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Starkler is offline
 
Join Date: Sep 2004
Location: Melbourne
Posts: 4,900
Top one is a tension adjustment.
Bottom one is a focus lock. If any tension at all on this you may loose half of your focus travel, so leave it loose or better yet take it out completely so you dont loose the screw.
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