High Clarity Optical Double Convex Magnifying Glass for Stamp and Coin Collectors 1. Material Composition: Optical-Grade Glass: High-transparency, low-impurity borosilicate or crown glass with minimal ... Read More
Custom Large Diameter Plano Convex Lenses for Photographic Lighting and Soft Focus Effects Material & Core Properties: These lenses are crafted from high-optical-quality glass, typically BK7 or optical crown ... Read More