The 'standard' magnification for a loupe (for jewellery & gemstones, stamps & coins) is 10X.
This one is 15X
The diameter of the lens is 12mm
Too see reviews of loupes, click here
My personal opinion is that if you want a loupe that is more than 10X magnification, go for a 15X rather than a 20X, and go for the absolute-best quality / smallest lens (this one is 5-element, better than than the usual high-quality 'triplet' lens).
It is, however, a small lens. You will always (with any loupe) have to compromise between lens size and optical quality.
Magnification / lens size in mm: 15X12
Lens material: glass
Lens type: 5-element (i.e. once loupe with 5 lenses on top of each, for best possible quality)
Type: jeweller's loupe (small, pocket-size, folds into its metal casing)
Origin / brand: we import these from China
Presentation / extras: soft leather pouch and plain cardboard box
Everything you need to know about magnifiers and magnification.
See information about (and reviews of) loupes (small high-power folding jewellers' magnifiers).
Video (electronic) magnifiers, video magnifiers compared.
Products: see pocket microscopes and phone microscopes, click here.
With most magnifiers* magnification and working distance are related. Download our Excel sheet, enter a magnification to see the resulting working distance, enter a working distance to see the resulting magnification.
* excluding surgeons-type, digital & phone magnifiers, and microscopes.