Fresnel Lens Optical PMMA Threaded Condenser(D70mm-FL30mm)

THREADED CONDENSER devise: Round Fresnel lens with 0.3mm thread pitch mounts securely in LED light, stage light, flashlight and projector housings for stable beam adjustment HIGH TRANSMITTANCE PMMA: Acrylic lens material delivers 92% light transmittance with a 2mm thickness, keeping output bright across -40°C to +80°C working temperatures MULTIPLE DIAMETER OPTIONS: Available in 20mm, 40mm, 42mm, 50mm, 60mm and 70mm diameters with selectable focal lengths, so you can match the exact beam and output angle you need DIY PROJECTOR AND VR READY: Suits DIY projector builds, VR glasses, magnifying observation of images and details, plus optical experiments, research and product development EASY SPEC SELECTION: Model format "D20mm FL50mm" means 20mm diameter and 50mm focal length; confirm diameter and focal length before ordering, package includes 1PC lens