Round Fresnel Lens PMMA Threaded Condenser 20-70mm for LED Light Projector VR Optics(D50mm-FL28mm)

High-precision threaded concentric grooves and collimate light efficiently, reducing beam spread and improving output angle control for LED, stage, and flashlight applications. Crafted from optical-grade PMMA acrylic with 92% light transmittance, ensuring bright, clear projection while remaining lightweight and shatter-resistant for safe handling. Versatile compatibility: works with DIY projectors, VR headsets, magnifying viewers, and optical research setups. Suitable for use with standard LED modules and lamp housings. Available in multiple diameters (20mm, 40mm, 42mm, 50mm, 60mm, 70mm) with a uniform 2mm thickness and 0.3mm thread pitch, allowing precise focal length selection for custom builds. Wide operating temperature range from -40°C to +80°C, ensuring stable performance in various environments, from indoor prototyping to outdoor lighting fixtures.