Finder Focus Adjustment - Canon EOS 20D Service Manual

Adjustments

2.2 Finder Focus Adjustment

CAUTION
<Purpose>
To fit the position of CMOS sensor plane and the viewfinder focus point.
<Specifications>
The center of the infinity mark must be positioned within the 1.5 index line
widths of the index line as shown below.
<Tools>
• Magnifier AD-S
• Lens with focusing scale. Lens of 100 mm focal length or less is desirable.
• General purpose 500mm collimator
<Preparation>
1) Without the lens attached to the camera, turn the diopter adjustment dial of
the camera to adjust the AF frame to be at the center of the viewfinder.
2) Attach the magnifier to the camera eyepiece and adjust the diopter of the
magnifier. (Perform without the lens attached.)
<Adjustment Procedure>
1) Look through an object that is located at least 250m away (such as lightening
rod or chimney) and turn the manual ring to find the position that gives the
clearest view of the object.
2) Check if the center of the infinity mark is positioned within the 1.5 index
lineequivalent widths. If not, replace the focus washer and try again.
Note: When a collimator is used, select the focus washer that gives the clearest view of the collimator
scale.
• Be sure to perform the Finder Focus Adjustment after the FFD
Adjustment is completed.
Fig. 010
Fig. 011
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