You can interchange the camera's focusing screen to suit the picture-taking application. You must also set C.Fn-0 so that the criteria for the correct exposure suits the focusing screen
![](/library/attachments/ServiceWareImages/LDImages/SolutionAnswer/EOS 1v 1v HS/Untitled-139.jpg)
![](/library/attachments/ServiceWareImages/LDImages/SolutionAnswer/EOS 1v 1v HS/Untitled-140.jpg) |
Open the side door and press the <C.Fn> button
- The Custom Function No. appears
Turn the dial until "F-0 appears
Press the <C.Fn> button for 2 seconds
- Either "0" or "1" will be displayed on the LCD panel
- Pressing the <C.Fn> button toggles between 0 and 1
Press the shutter button halfway
- The LCD panel's normal display reappears
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![](/library/attachments/ServiceWareImages/LDImages/SolutionAnswer/EOS 1v 1v HS/Untitled-141.jpg)