Help needed please re G11
 

I have a G11 which I have been learning how to use, and while most of the time I get results I can open, I have had several files with the suffix .ctg.

I actually had to resort to reading the manual yesterday, but nowhere can I find what this file is. I wonder if it is a corrupted file as it is sequential in the run of photos I have taken.

Any ideas anyone?

Hallo BeckH,

Not having a G11 I can only guess at what these ctg files are although I believe it to be a good guess. When shooting jpeg images the camera also produces thumbnail files which allow the files to be viewed in Canons own software. On my old G5 if memory serves me correctly these files had the suffix thm. If you check, you'll probably find that for every image you will have an associated ctg file. Most editing applications i.e. Elements, Photoshop and others, produce their own thumbnail images so these ctg files aren't really necessary.

Edit: out of interest I did a quick Google and came up with this site. Read the second post by Chuck Westfall who is one of Canons own gurus. [URL]http://www.prophotohome.com/forum/canon-eos-digital-slr-1-6x-sensors/11282-what-ctg-file.html[/URL]

It's basically as I said earlier though, these files may be required if you only use Canons own software for editing etc, but if you are using most other image editing products then these produce their own thumbnail images so the ctg files are not important. If you want to convince yourself, then drag and drop one image plus it's associated ctg file into a temporary folder followed by deleting the ctg file and sending it to the recycle bin. Open the image in your editing programme - if it opens ok then you'll have confirmed that you can safely ditch these ctg files and save hard drive space.

Hi Forsetti, thank you for your response.

I have been deleting these files anyway as I couldn't open them. I only use PS for editing my G11 files; I haven't even downloaded the Canon software. So they won't be any use to me.

So, at least I don't need to worry about them. Typically there is nothing on the enclosed CD to explain them.

Not a bad camera, so far anyway.

Regards Becky