The Lomography Diana+ Splitzer is a masking filter for use with the Diana+ (and F+) camera. The two spinning blades within the Splitzer allow this masking filter to only expose certain parts of the picture at once, and then in turn to expose other parts. You can slice an image into halves, quarters, or even eighths. Simply shoot, use the camera's multiple exposure feature, turn the Splitzer, and shoot again.
In the Box
Lomography Diana+ Splitzer - Masking Filter for Shooting Multiple Exposures with Diana+ Camera