Kooter's Geology Hand Lenses and Brunton Pocket Transits

Hand Lens Magnifiers for Geology and Earth Sciences

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Closeout Clearance!

Watch a quick YouTube video:
How to use a hand lens

See our Selection Guide if you need help choosing which magnification to buy.

After 17 years we are closing!
June 30 2014, was the last day for on-line ordering

But Contact Us for info about ordering by e-mail. Thanks!

10x jeweler's loupe

18mm Value 10X  Mtriplet magnifier

The best Hastings Triplet magnifier value we have found. Costs little more than a good quality doublet magnifier. Clear bright image of this genuine triplet lens rivals the B&L hand-lenses at less than half the price, and the larger 18mm diameter makes it easier to use for some people.  Well made, nicely finished body.
  • 18 mm diameter lens
  • Well riveted pivot post
  • Supplied with leather pocket case
  • Weight about 1.2 ounce (35g)
  • Chrome finish
10X triplet hand lens was $16.00

Sale! $13.20 including shipping and neck lanyard

3 available as of July 24 6:00 AM



10x large jeweler's loupe



21mm Large Size Pro-Value 10X triplet magnifier

A very nice 10x magnifier in a larger diameter. Notice in the image that the square grid lines from below the lens are very straight and parallel, with little noticeable linear distortion. And this magnifier also has an anti-reflection lens coating. Professional matte black finish on lightweight aluminum body.
  • Anti-reflection lens coating
  • Matte black finish
  • 21 mm diameter lens
  • Well riveted pivot post
  • Supplied with leather pocket case
  • Weight about 1.4 ounce (40g)
Large Pro-Value 10X triplet hand lens was $26.50

Sale! $22.50 including shipping and neck lanyard

34 available as of July 24 6:00 AM



Magnifier Selection Guide

  • 7X is an excellent choice for 3D objects in biology. Popular with Master Gardener programs. Large size and good depth of focus makes it a good choice for teaching hand lens use to youngsters.
  • 10X is appropriate for most all general science purposes. The preferred magnification for many jewelers and gemologists. Can usually be used without removing eye glasses or sun glasses.
  • 14X - 15X is about the upper limit for general purposes, and may require removing eyeglasses for use.
  •  20X  is for specialized purposes, and has very little depth of focus.  Using it requires the patience and knowledge of a trained person.  It should only be used in addition to, and not in place of, a lower power hand lens.
  • See Kooter Sez Hand Lens for more selection advice
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Last revision 07/24/2014