Round PMMA Fresnel Lens 20-70 mm Threaded Capacitor for LED Light Projector VR Optical DIY 1 Piece (D42mmxFL40mm)

High quality PMMA acrylic material with 92% light transmission ensures light collection and efficient for LED, stage, flashlight and fishing light applications. Precision threaded concentric grooves effectively adjust the beam angle and output, ideal for DIY projectors, VR glasses and observing magnifying images or details. Available in various diameters (20mm, 40mm, 42mm, 50mm, 60mm, 70mm) with a thickness of 2mm and a thread pitch of 0.3mm, providing flexibility for various optical configurations. Durable and temperature resistant from -40°F to +176°F, suitable for continuous use in optical instruments, research experiments and product development. Lightweight round device easy to mount and integrate into custom optical systems, perfect for teaching laboratories, prototyping and optical product innovation.