Used CV Lo-Key SQ 67mm square filters in case for Pro4 and Cokin A series holders. This is one of Pro4's Controlled Vignette filters for Square format cameras such as the Hasselblad 500 series or Bronica SQ. The Low Key filter darkens progressively towards the edge, concentrating light into the focused subject in much the same way as old-master paintings, vignette contrast being controlled by lens aparture, Optimum aperture when used on a standard lens is f/5.6.
Condition:
several light marks around edges where it's scuffed on filter holder, no affect on quality The photograph above is the actual pre-owned Pro 4 CV Low Key SQ on offer for sale.