Watchmaker’s Eyeglasses Single bi-convex lens, diameter 20mm, in plastic mount. Magnification varies between approximately x2 for the 4in. model to x6 for the 11⁄2in. model. Dimension given is the focal length.
Size
MB100-15 4in. (100mm) MB100-19 3in. (76mm) MB100-25 11⁄2 in. (38mm)
Folding Magnifiers
Hand held. Doublet plano-convex lens, diameter 17mm in plastic body. Magnification as indicated.
MB115-16 x8 MB115-20 x10 Watchmaker’s Forceps – see Dissecting section. Watchmaker’s Screwdrivers – see Tools section.
Magnification
Unless otherwise stated all magnifications quoted are linear and may be approximately converted to area by squaring, i.e. x2 linear equates approximately to x4 area taken at the point where optimum definition is obtained.
Magnifiers, Watchmakers, Folding and Reading Folding Magnifiers
Bench mounting. Bi-convex glass lens in folding plastic frame. MB135 series are Linen Testers.
With aperture scales Linen tester, x8. Lens diameter 8.5mm. Dimension given is the scale length per square side.
MB135-10 1⁄2in. MB135-12 10mm
Reading Magnifiers
Magnification approximately x2. Dimension given is lens diameter.
Acrylic lens. Acrylic frame and handle. MB150-10 40mm MB150-15 80mm
