Amazon Returned Equinox 800 Metal Detector two coil Bundle, Pro-Find 35 Pointer with Minelab Gear
Three element 20 power 21 mm jewelers loupe in a polished metal housing with a leather case.
• Professional Triplet Loupe
• Magnification: 20X
• Lens Diameter: 21mm
• Round Shape
• Chrome body
• Leather Pouch
These magnifiers feature quality polished glass Triplet Lenses in a polished metal housing with a sturdy leather protective case.
The Triplet Lens design is an optical device consisting of three singe lenses. The triplet design is the simplest to give the required number of degrees of freedom to allow the lens designer to overcome all Seidel aberrations. Aberration leads to blurring of the image productid by an image-forming optical system.