In terms of post production I need to measure the exact distance from the camera sensor to several objects on the set.
Where I can find specifications to determine the sensor position of a canon 600D?
Most DSLR cameras have a sign on the top (Plimsoll mark) which looks sort of like
The line indicates the position of the sensor plane.
I googled for pictures of the 600D. It also has this indicator on the left side of the camera top.