EOS filename & time stamp

[paseve]

Is the timestamp within the file name of an EOS backyard  file synched to the camera time or to the laptop/computer time?   Does the time stamp represent shutter open or file write or some other event?   What is the best way to derive the actual real time of the start of an image?   I am trying to back that time out to corroborate an asteroid occultation.

[astroman133]

I believe that the timestamp in the name of the image file is the PC time at the start of the image (what you called the shutter open time).

[admin]

Correct, it's the time at the start of the image capture.

[paseve]

Thank you both.   I thought that was the case, but was looking for confirmation!