Premium PMMA material: made of acrylic (PMMA) with 92% light transmission for clear and efficient optical performance MULTIPLE Diameter options from 40mm to 100mm with a focal length of 60-80mm for various optical and solar projects Precise optical device: 0.3 mm thread pitch (0.5 mm for 100 mm diameter/120 mm focal length) ensures accurate light condensation and concentration Wide temperature range: works reliably from -40°C to +80°C, suitable for indoor and outdoor applications Versatile use: ideal for solar concentrators, light capacitors, optical DIY experiments and educational science projects
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