The Silvestri 5010 Bellows Viewer is a collapsible viewing bellows made to be used with the D7023 series 5x7 sliding backs. It comes with a 4x achromatic magnifier lens for critical ground glass focusing. Removing the 4x lens allows you to easily see the entire image area in bright light without the need for a focusing cloth.
Bellows Viewer with Magnifier for the 5x7 Sliding Back
Removable 4x Magnifier Lens