Horseman SW Shift Finder Mask Set for 45mm Lens Unit

Dedicated to the Horseman SW Viewfinder when used in conjunction with an SW612-series camera, 6 x 9-format back, and the 45mm Lens Unit, this SW Shift Finder Mask Set helps to provide an accurate field of view for composing your image. This mask features a pre-shifted design that compensates for 10mm of lateral shift or vertical rise/fall to permit working with some camera movements while using the auxiliary viewfinder to compose. Additionally, this mask incorporates a circular peephole beneath the rectangular window that allows you to view the lens unit's distance scale and horizontal spirit level while your eye is pressed to the viewfinder.