10-38mm Flat Convex PMMA Condensor Lens for Zoom Flashlight and Bicycle Headlamp - Aspherical Optical Lens, 1 Pack (1pcx35mm)

Versatile size selection: Contains 1 piece flat convex PMMA condenser lens with diameters from 10 mm to 38 mm (10, 15, 18, 20, 23, 25, 28, 30, 32, 35, 36, 38 mm). The manual measurement tolerance of 0.3mm ensures a precise fit for your zoom torch or bicycle headlight project. Acrylic material: This aspherical flat convex lens is made of durable, reusable PMMA (acrylic) and provides excellent light transmission and focusing performance. It is lightweight yet durable and resists bumps and scratches for long-term use in outdoor lighting applications. Aspherical flat convex device: the aspherical surface reduces spherical aberration and improves the uniformity of the light beam, making it ideal for condenser applications. The flat convex shape efficiently collects and focuses the light from LEDs or bulbs and focuses it in a concentrated beam. Wide application: perfect for DIY zoom torches, bicycle headlights, stage lights, search lights and other optical focusing systems. Compatible with standard flashlight housings and lamp modules that require a condenser lens for beam adjustment. No special tools required. Simply insert the lens into the designated slot or holder of your torch or lamp assembly. Make sure the convex side faces the light source to ensure optimal focusing. Always touch the product with clean hands or gloves to avoid stains.