The sealed multiple-lens system comes standard with Zeiss' T* Multi-Layer Anti-Reflective coating, which both minimizes distracting environmental glare and enhances 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.

The D40 is an ideal choice for field geologists and entomologists, numismatic appraisers, electronic and optical quality inspectors, photo and litho printers ... indeed for anyone whose profession or hobby frequently requires a strong, top quality magnifier.