Description
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Adjustable Slit
Description
A 75 mm diameter circular metal disc with 12.5 mm central aperture.
A screw controlled spring loaded precision slit is mounted on one side of the disc.
Max opening 4 mm wide and 10-12 mm long.
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Linen Tester
Description
These are collapsible pocket magnifiers. The optical system is a single element, glass Double Convex Lens. The housing is made of machined, black high grade plastic for a high finish look. These magnifiers fold flat to fit in your pocket. Scales are etched on the inner faces of the viewerÂ’s base.
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