Changing bag

A changing bag is made of light proof material, and usually is composed of synthetic fibre.

They are also commonly found on the set of a film, where the clapper loader may need one if shooting on location or far away from a darkroom.

[1] A changing bag is routinely used by amateur photographers and others when a darkroom is not available as is often the case in field shooting.

A changing bag has two sleeves at one end for both the user's arms, and a zipper (often more than one, for double layered changing bags) to insert the tools and film needed.

There are several sizes available, from smaller ones for many still photography applications to larger bags used in large-format still photography or film making, which may need to hold both a magazine and a can of film stock which each have a 1000-foot capacity.