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HD Projector DIY Lens Focal Length 195mm Optical Glass Penta Lenes Green Film | eBay
HD 4.3-7'' LCD Sceen DIY Projector Focal Length 185mm Lens Coated w/ Films | eBay
DIY Smart Phone Projector - The Stem Laboratory
Homemade HD Projector with Nexus 7 Screen, Field View Camera Lens, Arduino Keystoning « Adafruit Industries – Makers, hackers, artists, designers and engineers!