6X achromatic triplet folding pocket loupe. This larger diameter (22mm, approx 7/8") 24-diopter folding loupe is an ideal choice for stamp and coin enthusiasts, archivists and antique hunters. Its wide field of view allows you to comfortably examine the entire specimen. The D24 comes standard with Zeiss T Multi-Layer anti-reflective coating, which both minimizes distracting environmental glare and improves the clarity of the image seen through the lens. The tough, reinforced polymer shell is much lighter than a metal frame, but provides better shock protection for the lenses in the event the loupe is dropped.