How To Remove the Canon Digital Rebel (300D) Focusing Screen
July 6, 2004
This guide provides instructions on how to remove the focusing screen for the purpose of either cleaning or to install a
new screen.
DISCLAIMER: THE INSTRUCTION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE EXECUTION OF THE BELOW INSTRUCTION
IS WITH YOU. SHOULD THE INSTRUCTIONS DAMAGE THE CAMERA, YOU ASSUME THE
ENTIRE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
1. Ensure that the camera is relatively dust free and that your work environment is dust free.
2. Remove the lens from the camera.
3. Place the camera on a towel upside down or on something so at least the camera is stable and relatively flat.
4. Looking within the camera, note the small metal tab behind the foam where the mirror hits when it lifts up as
shown below.
Focus screen
Metal bracket
Tab
Mirror
Shutter
Foam padding
5. Using a small tweezer, grip the little metal tab with the tweezer and push the tab gently towards the back of the
camera (1) then lift up (2) as shown below. The metal bracket should pop up. This does not take a lot of force to
accomplish. When lifting the metal bracket, ensure that it is firmly held and pulled away from the mirror to prevent
scratches on the mirror.
1
2
6. Using the tweezers again, use it to lift out the focusing screen by grabbing onto either tabs on the side of the
focusing screen. Lift it out slowly in the same manner how you did with the metal bracket (albeit lifting it an angle
will be slight more difficult as the small tab is being held by the tweezer). Note how the focusing screen is pulled
out as you'll want to ensure you put it back in the same way (and not upside down or reversed).
