Canon EOS 1V, Service Manual, Page: 75 / 240

1.11 R
EWRITING THE
E
XPOSURE
P
ROGRAM
PURPOSE
To fine-tune the correction data the EOS-1V has (like the EOS-3) for each maxi-
mum aperture.
TOOLS
EF-8000 or EF-5000
EF 50mm f/1.8 lens or user’s lens or EF 28-135mm f/3.5-5.6 IS lens
PREPARATIONS
1) On the AE Adjustment Menu, select [F4] Exposure Program Rewriting.
2) Attach the EF 50mm f/1.8 lens to the camera and set the camera to aperture-
priority AE with an f/8 aperture. Set the lens to infinity with manual focus, and
measure the exposure level for each brightness.
3) Next, attach the user’s lens or the EF 28-135mm f/3.5-5.6 IS lens to the camera
and set the camera to aperture-priority AE and f/8.
ADJUSTMENT PROCEDURE
1) Select the difference between the EF
50mm f/1.8 lens and the user’s lens
or EF 28-135mm f/3.5-5.6 IS lens.
Example:
EF 50mm f/1.8 lens exposure:
–0.15 EV
User’s lens: +0.10 EV
–0.15 EV – (+0.10 EV) = –0.25 EV
The example here corrects the expo-
sure level to match the EF 50mm f/1.8 lens’ exposure level.
NOTE:
To change the exposure level to overexpose or underexpose for all lenses, use AE
shift.
2) The rewriting takes about 1 minute. To confirm the change, follow the PREPA-
RATIONS procedure.
4-21
Part 4: Electrical Adjustments
AE_PROG1
Select with Cursor key: press RETURN key
Press SPACE bar to return to AE menu screen.
F1 2: Standard(0)
F2 0: -0.25EV shift
F3 1: -0.125EV shift
F4 3: +0.125EV shift
F5 4: +0.25EV shift
Exposure compensation program rewriting
Exposure compensation program of 1 is being written.
• Before rewriting the exposure program, execute the basic AE adjustments.
For normal servicing, select “Normal (0).” Or set the compensation
amount (+ or -) according to the user’s preference. (Initialization will set it
to “Normal [0].”)
• The data is written to the FPU IC’s flash ROM. Therefore, do not repeat
rewrite the exposure program.
CAUTION