Breakthrough Photography X4 3-stop ND (77mm) process_C41 Colour You probably remember View-Master discs:

You probably remember View-Master discs: round

The included Schneider-Kreuznach 135mm f/4

Notable features include a manual focus clutch

Cosmetic condition is very clean

but you can rotate it so that the flash tube is vertical or horizontal- and it includes a diffuser panel for wide angle lenses (to 28mm)

Breakthrough Photography X4 3-stop ND (77mm) process_C41 Colour You probably remember View-Master discs:Breakthough Photography calls this an "X4" filter, but it's a 3 stop ND, which actually makes it an 8X. The branding is confusing, but the filter is good, with neutral colours and an easy grip frame. In excellent condition. For 77mm thread size.