Canon EOS-3 manual Interchanging the Focusing Screen, 133

5. Interchanging the Focusing Screen

The camera’s focusing screen can be interchanged to suit the picture- taking application. You must also set Custom Function CF-0 so that the standard exposure standard suits the focusing screen.

Focusing Screen Type	Screen Designation	Custom Function CF-0 Setting
N : New Laser-matte Screen	Ec-N, Ec-R	0
L : Laser-matte Screen	Ec type (A, B, C, CII, D, H, I, L)	1

1 Open the side door and press the < > button.

• The Custom Function No. appears.

2 Turn the < > dial until “ ” appears.

3 Press the < > button for 2 seconds. Either “ ” or “ ” will be displayed on the LCD panel. Pressing the < > button toggles between and .

4 Press the shutter button halfway. The LCD panel’s normal display reappears.

•If you do not replace the focusing screen that came with the camera, you need not change Custom Function CF-0’s setting.

•To change the focusing screen, refer to the Instructions that comes with the focusing screen.

•The Ec-A, Ec-B, Ec-I, and Ec-L focusing screens has a prism at the center. This prism cannot obtain standard exposure readings during evaluative and spot metering. Use centerweighted averaging metering or off-center spot metering instead.

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