The Shade + is an adjustable lens shade for 35mm and Digital SLR cameras. Bellows compress while slide track folds for portability while carrying. Made of high impact polycarbonate and anodized aluminum. Rear standard accepts any 3 x 3' material up to 1/16th" thick, front standard accepts 3-1/2 x 4-1/2" (model #911) and 4-1/2 x 4-1/2" (model #912) special masks and vignetter. 35mm cameras and 6x4.5cm Bronica, Mamiya and Pentax cameras accept model #911, while medium format 6x6 and 6x7cm cameras, including Hasselblad, Bronica, Mamiya, Pentax and Rollei accept model 912. Both Shade + are attached to lenses with adapters.