Amazon.com : Special Effects Filters 79mm Handheld Subtle Kaleidoscope Prism Semicircular Glass Filter can Change The Number of Subjects by BITINBI : Electronics
New Lens Filters With Built-In Prism Effects
PRISM LENS FX KALEIDOSCOPE FX FILTER 77MM Best Price: thereliablestore.com: Lens Filters India
Prism Lens FX - Test Film (5K) - YouTube
Fractal Filters: Glass filters for prism photography and video.