This duel loupe provides two lenses in one housing giving you the option of both 10x and 20x magnification without having to carry around two separate magnifiers. Although the brand name is 'Triplet' note that both lenses are made from single elements (singlet).
To correctly use a hand lens you need to raise it up closely to your eye while holding the object you wish to examine within the focal range of the lens. There is a hole on the loupe for a lanyard.
NHBS Lanyard (Neck Strap) - a fieldwork essential! Keep your hand lens, GPS or mobile phone from getting lost in the field.
Two single element lenses:
* 10x magnification with a 18mm viewing field
* 20x magnification with a 12mm viewing field
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