One of the nice things that Darkroom Innovations sells is a dark cloth that has elastic on the one end and velcro on the other. the elastic end fits around the back of the camera and the other end has a slot for your head and shoulders. That has the velcro on it. Light colored on the outside and dark (mine's blue) on the inside. The velcro is on the bottom so you can slip your hand in and use the loupe. Cost about $60.00 and it is well worth the money. Just wad it up and toss or stuff it in the backpack. Someone is bound to have mentioned this before but I will mention it too.