Nikon PK-2 format_Medium Format The Minolta Flat Diffuser is

The Minolta Flat Diffuser is used for illuminance values and lighting ratios

This one has good locks and a shorter top plate with an open slot for the camera mounting thread

It has a built-in flash

removable insert

Leitz New York SL skylight filter for the 50mm f1

Nikon PK-2 format_Medium Format The Minolta Flat Diffuser isThe Nikon PK 2 is a 14mm extension tube for manual focus F mount lenses. Will mount to any F lens and body, but transfers aperture information via old school pre AI bunny ears, so depending on your camera and or lens, you may need to meter stopped down on this one. In good working order, with minor cosmetic wear.