Colorful Prism 77mm Glass Filter Kaleidoscope Prism for photo Variable Number of Shooting Objects Gourmet Effect SLR Accessories - AliExpress
Fractal Filters: Glass filters for prism photography and video.
Filtri per Effetti Speciali Fotografici, Prisma in Vetro a Doppia Mezzaluna per Sfocatura in Primo Piano, Prisma in Vetro Doppio da 77 Mm, per Fotocamere SLR Filtro per Effetti Speciali : Amazon.it:
CPAP Machine Filters Lowenstein Prisma
✓ Excellent Filter PRISMA 77mm Closed-Up Lens Set Japan Lenses Filters Lens | eBay