Zeiss 10X Triplet Loupe

The Zeiss 10X Triplet Loupe is a professional-grade magnifier engineered to deliver an exceptionally large field of view with outstanding optical clarity. Designed and manufactured by Carl Zeiss, this loupe is built for jewelers, gemologists, and precision craftspeople who demand the highest standard in optical performance. The model reference is Einschlaglupe D 40, part number 205171-9200.000 057L09.

At the heart of this loupe is a 13mm diameter glass lens with a field of view that spans nearly the entire 13mm aperture — a distinction that sets it apart from competing triplets that may offer larger lenses but cannot match this usable field of view. The lens features an anti-reflection coating to reduce glare and improve contrast, ensuring clean, accurate color rendition during stone grading, hallmark reading, or detail inspection.

The aplanatic-achromatic lens system design eliminates distortion and chromatic aberration across the full field of view, including the peripheral zones — the result of Carl Zeiss's advanced optical research. As noted in the included owner's manual: "The field of view is therefore exceptionally large for the magnification power… the aplanatic-achromatic design of the lens systems provides you with a field of view which is practically free of distortion and chromatic aberrations right into the peripheral zones."

The optical assembly is housed in a durable plastic casing that provides protection against accidental drops, making it a reliable companion at the bench or in the field. When folded, the loupe measures a compact 25mm × 38mm × 15.5mm, fitting easily in a pocket or tool roll. A 2.5mm hole through the rivet allows the loupe to be hung from a chain for convenient wear or storage.

This is the only 10X triplet offered by Otto Frei that includes an owner's manual — a reflection of the confidence Carl Zeiss places in this instrument as a high-performance optical product.

Features

• 10X magnification with aplanatic-achromatic triplet lens system
• 13mm diameter glass lens with field of view spanning nearly the full 13mm aperture
• Anti-reflection coating for reduced glare and improved contrast
• Distortion-free and chromatic aberration-free performance to the peripheral zones
• Durable plastic casing for protection against accidental impact
• Compact folded dimensions: 25mm × 38mm × 15.5mm
• 2.5mm rivet hole for chain suspension
• Includes owner's manual — unique among 10X triplets in this catalog

Specifications