Canon CN-E30-105mm Manual - Page 8

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F.B. (Back Focus) Adjustment

F.B. (back focus) of this lens can be adjusted in the following procedures.

Before starting, select an object with sharp contrast at a distance* that facilitates the

adjustment work.

* Recommended object distance range: 6 to 12 ft.

Remove three screws

and remove the F.B.

adjuster cover as in the

right figure.

Note: Be sure to keep the

screws for later reattachment.

Mount the lens on the

camera and turn two

F.B. adjuster screws

counterclockwise one

revolution as in the right

figure.

CAUTION

Be sure to securely mount the lens on

the camera mount.

Note: Be sure not to remove

the screws.

F.B. adjuster

cover

Screws x 2

Screws x 3

360 degrees