topic Computers unable to read CTG file from EOS 5D Mark III in Camera Software

Computers unable to read CTG file from EOS 5D Mark III

PicturePlace — Sat, 23 May 2026 18:44:45 GMT

Hello Everyone,
While using my EOS 5D Mark III to cover my daughter's Nurse Pinning Ceremony, I switched to video mode and made some recordings. I have downloaded the files on my MacbookPro and Hp Laptop but unable to read the .CTG file. Please, I need help on how to view my daughter's Pinning ceremony.

Thank you

Re: EOS 5D MARK III

kvbarkley — Sat, 23 May 2026 01:50:42 GMT

Do they play in the camera.?

how did you transfer them?

Re: Computers unable to read CTG file from EOS 5D Mark III

normadel — Sun, 24 May 2026 04:46:47 GMT

The .ctg files are NOT image files. They cannot be read.They are used internally by the camera and contain metadata for organizing a card. Do a web search for "Canon .ctg files" to see lots of explanation.

There should be actual image files on the cards in image formats, like JPG, PNG or RAW for stills and MOV or MPG for video.