Shindler Carat Estimator - The Shindler Scale for gemstones
One of its kind! Unique and irreplacable in the industry of gemstones, the Shindler Loupe lets you estimate a stone's weight, even if it is still mounted. It is exceptionally valuable tool for jewelers needing to estimate a stone that is still mounted in a piece of jewellery i.e. bracelet or ring. Naturally, it is also ideal for estimating loose stones.
Easy to use, it features a center scale that doubles as a 6.5mm gauge to evaluate a stone's weight and size up to 1ct. Simply place the stone face down on the inside of the replaceable 2.5cm clear tape protected screen.
Delivery of the Shindler Loupe includes a vinyl plastic booklet with instructions and calibration charts.
See more about the Shindler Scale above in "About Shindler".
Easy to use, it features a center scale that doubles as a 6.5mm gauge to evaluate a stone's weight and size up to 1ct. Simply place the stone face down on the inside of the replaceable 2.5cm clear tape protected screen.
Delivery of the Shindler Loupe includes a vinyl plastic booklet with instructions and calibration charts.
See more about the Shindler Scale above in "About Shindler".
- Magnification: 10x
- Lens Type: biconvexe
- Lens Material: glass
- Lens Diametre: Ø14mm
- Scale: The Shindler Scale for gemstones - Carat Estimator
- Foot opening: 15x15mm
- Weight: 30g
- Construction: metal
- Dimensions:
Length : 3.6 cm
Width : 2.2 cm
Height : 3.30 cm
Inventing the Shindler Loupe, Bernard Shindler developed an ingenious solution to a problem in the jewelers trade that had never been satisfactorily solved. Shindler created the unique and very popular "Shindler Scale" which embodies specially graduated scales in a magnifier and thus enables the likely weights to be read off quite straightforwardly, even while the stones are still mounted.
Bernard Shindler enjoyed a long career in the diamond trade, which he much loved and in which he had many years of experience in inspecting and valuing precious stones (mostly in preparation for mounting in jewelers items). Combined with many years experience in precision engineering, his insight changed the way jewelers work and estimate precious stones.
Biconvex lenses are also called convexo-convex lenses and are mainly made out of a special quality glass. Different types of biconvex-lenses exist such as the planconvex-lens. The most common biconvex lens is the symmetric-convex lens as used in this magnifier.
The biconvex lens is manufactured with identical convex surfaces each side of the lens. The focal length is equal to the radius of the curvature. Resulting from its perfect symmetry it produce images close to 1 and up to a magnification of 8x. Biconvex lenses have positive focal lengths and form both real and virtual images.
Aberrations such as coma, distortion, and chromatic aberration almost exactly cancel out also due to the symmetry.