Canon EOS 55 Service Manual page 144

Part 3: Repair Information
4.1 O AF Focus ADJUSTMENT
PuRPosE:
The purpose of the AF focus adjustment is to match the AF sensor focus with the
CCD sensor focus. Unlike film cameras, the flange to focal plane distance (FFD) at
the center of the pressure plate is not applicable to this camera.
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The main mirror, sub mirror, and light receiving section of the AF sensor
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TOOLS:
Personal computer RS-232C cable HS-I/F
Adjustment software (stored on a work disk)
EF-8000 EF50mm
f/li3
tool lens
light Tripod
PREPARATION:
1) Select the AF Adjustment Menu.
2) Set the camera and chart as indicated for AF Focus adjustment.
Fig. 3-53 AF Focus Adjustment
3-53