FL28-120 Round Fresnel Lens 20-100 mm, Acrylic PMMA Condenser for LED Projector, DIY VR 1 Piece (50 mm x 70 mm-01)

High precision threaded concentric grooves (no 0.3mm, 0.5mm for 100mm) ensure uniform light refraction and sharpness for optical experiments or imaging. 92% light transmission with PMMA/acrylic material for light output; reliably operates from -40°F to +176°F for versatile indoor and outdoor use. Available in 10 diameters (20-100mm) with 2mm thickness; choose the exact size that matches your LED module, stage light, flashlight or custom optical platform. Ideal for DIY projector constructions, prototypes of VR headsets, inspection of details with a magnifying glass or adjusting the beam angle in lamps and lanterns without chromatic aberration. Smooth threaded edge and flat profile allow for easy mounting in printed supports, supports or frames; one piece per order for project-based testing.