- Problem: if you purchase an already-converted Vario-Sonnar 24-85
on the second-hand market, beware of lenses which have been
previously tampered with or serviced by unauthorized personnel. The
top mistake committed is the alignment of the rectangular hole of the
rear black plastic shroud. The left is INCORRECT. The right shows how
the rectangular hole is supposed to be properly aligned.
- Tools and materials required:
- jeweller's Philips screwdriver or better yet, #00 and #0
philips screw driver, JIS Type S (see this)
- Remove the three black screws holding the rear black plastic
shroud using a Philips screwdriver.
- Pull up the rear black shroud. The stop screw of the lens
mount will get in your way, but you may get around by rotating
the rear black plastic shroud clockwise and then lifting it.
- You should see three tiny copper spacer rings. It may be
still on the lens or stuck to the black plastic shroud you just
removed. Make sure you do not drop any of these inside the lens.
If you suspect some part has dropped into the inside of the lens,
please send the lens back to us for service.
- Put one of the black screws back to plug the first small
screw hole counting from the 8 o'clock position. Put the two of
the brass washers supplied on the second and the fourth small
screw hole. The rest of the screw holes are not used. The screw
and the brass washers will raise the 24-85 rear shroud just
enough that the back of the lens is completely flush. One brass
spacer remains unused. Click on image to enlarge.
- Put the rear black shroud back, getting around the stop screw
of the lens mount. Rotate counter-clockwise but do not shovel the
copper spacers into the lens while doing so! Rotate until the
rectangular opening aligns correctly as shown in the picture
- Secure the rear black shroud using the remaining 2 black
screws. The 2 black screws shall go through both the screw holes
of the rear shroud and the 2 copper spacers.