Voigtlander ground glass finder magnifier

Ground Glass Finder Magnifier

Ground Glass Finder Magnifier.
This chromium-plated accessory measuring 8 cm, was placed on the ground glass
of plate cameras, allowing to straighten the image due to its incorporated prism.
A swivel magnifier on the tube foot, allows a x4 magnification.

When the magnifier is rotated, the image is straightened but not enlarged.