10-38mm PMMA Convex Acrylic Condenser Lens for Zoom LED Flashlight, Bike Head Lamp, Optical DIY Project 1/5 Pack(5pcx28mm)

Versatile Size Options: Available in 10mm, 18mm, 20mm, 21.8mm, 23mm, 25mm, 28mm, 29mm, 32mm, 35mm, and 38mm diameters – choose 1 piece or 5 pieces to fit your specific zoom flashlight or bike head lamp devise. PMMA Material: Made from durable, transparent acrylic (PMMA) with a Flat-convex structure and aspheric shape, ensuring efficient light condensation and uniform beam projection for LED applications. Precision Optical Performance: devised as a condenser lens for zoom LED flashlights and bike head lamps, effectively focusing light to enhance brightness and range without distortion. Easy Integration: Compact and lightweight, compatible with standard flashlight housings and DIY optical projects. Manual size measurement with error within 0.3mm ensures reliable fit. Multi-Purpose Use: Ideal for flashlight upgrades, bicycle headlamp modifications, optical experiments, and other LED lighting systems requiring a Flat-convex or aspheric lens.