Square Fresnel Lens 30x30 40x40 50x50 100x100mm PMMA Threaded DIY Projector Condenser Magnifier(30x30mm-FL28mm)

High Transmittance PMMA Material – Crafted from optical-grade acrylic with 92% light transmittance, ensuring bright and efficient light concentration for projection, lighting, and magnifying applications. Precision Threaded Edge – Features a fine 0.3mm or 0.5mm thread pitch (40x40mm FL70mm uses 0.5mm) for secure mounting in DIY optical frames, holders, or custom housings. Multiple Focal Length Options – Available in 30x30mm, 40x40mm, 50x50mm, and 100x100mm sizes with specified focal lengths (FL) to suit various beam control, focusing, and magnification needs. Wide Application Range – Ideal for LED lights, stage lights, flashlights, fishing lights, DIY projectors, magnifying fine details, optical experiments, research, and product development. Durable & Temperature Resistant – Operates reliably from -40°C to +80°C, with a slim 2mm thickness for lightweight integration into compact optical systems.