Yazılım güncellemesi yapmayı denediniz mi?

https://www.canon.com.au/en-AU/Perso...irmware-Update

Bakın ne yazıyor koyu renkli yerde:

Changes in this firmware:
Firmware Version 1.0.4 incorporates the following fixes.

  1. Fixes the following phenomena which may occur when the camera is used in combination with certain lens models (*) equipped with a stepping motor.
    *Affected lenses: EF-S 18-135mm f/3.5-5.6 IS STM / EF-S 18-55mm f/3.5-5.6 IS STM
    1. 1. The camera may freeze in rare instances if you try to shoot with a lens cap attached or meter a subject with low contrast in Live View (or Movie) shooting.
    2. 2. Fine focus adjustment may not be possible in Remote Live View on the EOS Utility software.

  2. Fixes a phenomenon in which some SD cards are not recognized by the camera.
  3. Corrects some misspellings displayed on the menu screen.
Makine, Live View kullanırken düşük konrastlı durumlarda bazen donabiliyormuş. Yeni yazılım bunun önüne geçiyormuş. Bence denemeye değer.