B009NVHEVU PEAK TS2044 Zoom Measuring Loupe, 8X – 16X Magnification, 0.40″ Lens Diameter, 0.79″ – 0.40″ Field View

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Smooth precision zoom mechanism with click stops at 8X, 10X, 12X, 14X and 16X
Both the object being inspected and the scale remain in focus through the entire range of magnification
High precision optical quality achromatic lens system with focusing from +2 to -2 diopters gives you a needle-sharp, brilliant image from edge to edge
Comes complete with measuring reticle, protective carrying case and lens cleaning cloth
Fully coated for color corrected flat field viewing