for project Life-Scale Camera (working title Element Camera). made ground glass from acrylic sheets, 3mm frosted. although not as cheap, it's bright and durable (not breakable). had to do some restoration work on the viewing frame, needs a new felt sealant. but both formats now have a viewing glass. sizes 6.5 x 8.5" and 10 x 12". these will be the biggest camera ever assembled.
here is a reference to how i got hold of these century old plate holders & rear elements.
http://kantaboxkamra.blogspot.my/2016/07/purchase.html
they are gems, but a waste if let to rot. am aiming to prepare a simpler build for demonstration by early next year, if my resources & time allow.
