Locally Fabricated Tools - Canon EOS 55 Service Manual

Part 3: Repair Information
1.5
LOCALLY FABRICATED TOOLS
Make the following charts from paper of the reflectance indicated.
1. AF Charts
•AF reference chart
Place 90% white strips centered on on 2% black paper as shown.
2%
00%
~
00%1
~
A4 Size
• •• ••
15mm 19mm 17mm
Fig. 3-3 AF Reference Chart
•16mm bar chart (AF accuracy check)
A4 Size
Attach 16mm 90% paper vertically to 2% A4
paper as shown below.
•45° bar chart (AF accuracy check)
Attach 16mm 90% paper diagonally to 2%
A4 sheet as shown below.
•Low-contrast chart (AF accuracy check)
Make chart a center 15mm wide 90% white
over a 64% light gray background.
3-4
Fig. 3-4 Single Bar (16mm) Chart
45°
~q:
Fig. 3-5 45° Bar Chart
Fig. 3-6 Low Contrast Chart