Pardon me for ignorant. As a photographer myself for years, I still dont get the term for this item correct. This kind laptop bags are like the normal ones we commonly see. Location photographers have this kind of bags where when opened up, you will have a hood to hang on to the sides thus allowing tethered shooting as well as viewing of photos through this mobile darkroom.
It look something like this:
May I know what is this kind of bag called?