I have been given some P Size (panoramic) filters. What are they and can they be used with my matte box?
P Size are glass filters in 4″ x 5.65″. Whilst the Genus matte box was not designed to work with P Size filters, they can be placed into the filter trays, however, a) your rotation is very much reduced to around 40 degrees and b) you can only use a vertical graduated filter and not a horizontal one.