Round Fresnel Lens PMMA Threaded Condenser 20-70mm for LED Light Projector VR Optical DIY,1pcs(D40mmxFL50mm)

High-grade PMMA acrylic material with 92% light transmittance ensures bright, efficient light collection for LED, stage, flashlight, and fishing light applications. Precision threaded concentric grooves effectively adjust beam angle and output, ideal for DIY projectors, VR glasses, and magnifying image or detail observation. Available in multiple diameters (20mm, 40mm, 42mm, 50mm, 60mm, 70mm) with 2mm thickness and 0.3mm thread pitch, offering flexibility for various optical setups. Durable and temperature-resistant from -40°C to +80°C, suitable for continuous use in optical instruments, research experiments, and product development. Lightweight round devise easy to mount and integrate into custom optical systems, perfect for educational labs, prototyping, and optical product innovation.