The Double Mask system allows you to combine two scenes in one. The effect is achieved by exposing each image twice, one with each filter contained in the Double Mask set. One filter covers the center of the image, the other the surrounding frame. The system comes in two sizes: #342 and #345, which has a larger center spot. The double exposure can be achieved by setting the camera to its multiple exposure mode or with film cameras by re-cocking the camera without advancing the film. It is recommended that you meter without the mask in place.
This filter measures 85 x 85mm and fits the Cokin M series holder.
M (P) - 84mm x 84mm x 1.6mm
M (P) 85831447521