40x40mm Square Fresnel Lens PMMA Threaded DIY Projector Solar Condenser Magnifier(50mm)

Precision-molded PMMA acrylic lens with 92% light transmittance, delivering bright and clear focusing for solar concentration, projection, and magnification tasks. Available in focal lengths of 40mm, 50mm, and 70mm (0.3mm thread pitch; 70mm version uses 0.5mm pitch), allowing flexible beam control and optical setup customization. Ultra-thin 2mm profile with a lightweight square devise (40x40mm), easy to mount into DIY frames, holders, or existing optical fixtures without adding bulk. Durable and weather-resistant acrylic material operates reliably from -40°C to +80°C, suitable for indoor experiments, stage lighting, LED beam shaping, and outdoor solar applications. Versatile for multiple uses: adjust LED or flashlight beam angles, build a DIY projector, magnify small details, or conduct optical research and product development.