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Published on Jan 14, 2014
This lens has a focus ring that could not go all the way from near to infinity, because there was 3 loose screw's in the front helicoil, that block's the focus ring, but it was "easy" to fix... Now it works pertect... :-)
Use a rubber tool for taking off the nameplate, then unscrew the 3 screw that hold's the front plastic ring..., NOT the 3 screw's for the adjusting of the front lens group.
NEXT: there are 3 loose screw's at the side of the helicoid that will come loose by time, just use a SMALL drop of BLUE screw fastner that are LOCTITE 243, ... that's it.
UPDATE: It's better to use the LOCTITE 222 threadlocker..