My understanding having talked to a number of 1st AB Recce veterans (as well as other unit vets during Arnhem anniversaries in Holland) several decades ago, was that they did remove the scopes and jumped with their scopes packed in their scope cans, and then re-fitted the scopes to the rifles that they carried in rifle drop bags. They left the transit chests behind, to be brought out later, which didn't happen of course as the operation didn't quite go to plan...Of course not all dropped, as some went in by gliders, and likely they didn't remove their scopes, but that's a guess.