The whole light leak issue it is blown out of proportion. It is meant for people not even for astro photographers, but for those who shoot with body cap on their camera
Since I use camera to take photographs, I am not affected by this issue.
I wonder why canon even bothered giving out advisory, there are so many other canon models which exhibit the same behavior. If you are wondering what this light leak is, here is the explanation.
- Put your body cap on the camera body.
- Put the viewfinder cover that came with the camera over the viewfinder.
- Set the camera ISO to 800 and put the camera in “P” mode.
- Turn on the backlight for the LCD panel and watch the exposure change.
- It seems the top side LCD may be to blame.
- Yes, shining a flashlight on the top LCD causes the exposure to change, as does sunlight and bright overhead lights. All of which happen with the body cap on.
My 5D mark III does react to LCD, but only when the body cap on the camera body.
I tried with my 5D Mark III was take the lens cap off and meter off facing a relatively neutral wall in a very low light situation. I turned on the backlight and nothing changed. I then flashed a flashlight up against the top LCD and the exposure didn’t change. I also ran the flashlight around the camera body and absolutely nothing changed. If the camera acts properly with the lens cap off, who cares how it acts with the caps on? So please don’t return your 5D Mark III or overreact.