This loupe is an extremely high quality, achromatic, magnifying lens manufactured by BelOMO. The BelOMO loupe's large triplet lens provides a sharp, bright, clear and undistorted view as found in loupe magnifiers at many times the cost.
Feature:
Magnification ratio 10 times
Achromatic Triplet Lens
Focal distance, inch: 1.1 ; mm: 28
Linear field of view, inch: 0.67 ; mm: 17
Overall dimensions, inch: 1.54 x 1.1 x 0.98 ; mm: 36 x 28 x 25