This section restricted to Duclos Staff users.

Known Issues: Front optical group can get loose in housing if followers are stressed. Lightly shake lens to check.

Service Manual: Disassembly/Re-assembly

Full CLA: 7-10 hrs.
The optical core of this lens is mostly sealed except for the iris slot. Quote higher hours to pull all glass out to access iris.
Minor adjustments: 2-3 hrs.
Enter relevant notes here.
Focus scale end play: 1 hr
4 screws in stop ring under focus scale (revealed through window when focus is turned once scale is removed) can loosen. Tighten and glue screws
Focus end-play (affects image): 3-5 hrs.
Focus is generally held in with wave washer between delrin rings. Add custom teflon shims to reduce end play.
Clean/Align optics only: 3-5 hrs.
Enter relevant notes here.
Loose front group: 3-5 hrs. (3 hrs. for initial investigation)
All of the optics for this lens are held into place by 3 cam followers. Common problem: one or more of these cam followers can strip out of the optical housing for two reasons. One, the small cam follower screws are engaged in the optical housing with very little thread. Two, the weight of the optics since they are all in one housing causes a lot more stress on the cam followers.
PL Conversion notes
Rear element is cut from housing during PL conversion process. if lens needs to go to canon for repairs, lens must be converted back to EF mount before sending. Use designated replacement Rear Element when sending to canon and re-install cut out rear element after lens is returned and re-converted back to PL. Designated rear element will be stored in Canon Parts box with other spare parts.
PL Mount Conversion available exclusively from Duclos Lenses. https://www.ducloslenses.com/pages/cne-pl
RUSH Fee: add 25% of 6 hours to total for expedited installation
See Dis-assmebly guide for specific clearance tests
…end of Staff section