Gehmann #564 Rearsight Iris, 48 possible colors combination and single Polariser

564 Gehmann iris, 48-colour & single polariser Iris12 colour filters:
1. bank: orange, light green, yellow, medium grey, dark grey and amethyst
2. bank: Light blue, dark blue, lemon yellow, red, light green and lilac
Colours from one ring can be mixed with the other providing the remaining 36 colour options
Single polariser can be used as an iris only
Laser engraved serial number and indications
Removable steel threaded connection
Easy clean
instructions included
Black and silver anti-reflective finish