In Reply to: I guess posted by unclestu on February 1, 2013 at 17:34:12:
The servo acts like an auto focus so the laser doesn't a have a "definite focal length." I.e., it's variable.
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Follow Ups
- I 'll split the difference with you - geoffkait 03:51:27 02/02/13 (1)
- The focussing - unclestu 17:30:53 02/02/13 (0)