10-38mm PMMA Flat Convex Condenser Lens for Zoom Flashlight & Bike Head Lamp - Aspheric Optical 1 Pack(1pcx38mm)

【Versatile Size Selection】Includes 1 piece of PMMA Flat-convex condenser lens in diameters from 10mm to 38mm (10, 15, 18, 20, 23, 25, 28, 30, 32, 35, 36, 38mm). Manual measurement tolerance within 0.3mm ensures a precise fit for your zoom flashlight or bike head lamp project. 【 Acrylic Material】Crafted from durable PMMA (acrylic) Reusableplastic, this aspheric Flat-convex lens offers excellent light transmission and focusing performance. Lightweight yet sturdy, it resists impact and scratches for long-term use in outdoor lighting applications. 【Aspheric Flat-convex devise】The aspheric surface reduces spherical aberration and improves light beam uniformity, making it ideal for condenser applications. The Flat-convex shape efficiently collects and focuses light from LEDs or bulbs into a concentrated beam. 【Wide Application】Perfect for DIY zoom flashlights, bike head lamps, stage lights, searchlights, and other optical focusing systems. Compatible with standard flashlight housings and lamp modules that require a condenser lens for beam adjustment. 【Easy to Install】No special tools required. Simply place the lens into the designated slot or holder in your flashlight or lamp assembly. Ensure the convex side faces the light source for optimal focusing. Always handle with clean hands or gloves to avoid smudges.