Item Number: 3030344
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magnifier, hastings triplet 10x for printers and photo engravers
unique three-element design provides the ultimate in distortion free, color-correct viewing, facilitating reduction or elimination of "pin cushion" distortion and chromatic and spherical aberrations. two concave meniscus elements are cemented to a double convex lens, then mounted with threaded retaining rings in a machined black anodized metal cell which swing into a protective case. the case doubles as a handle for viewing.
we caution buyers that laws of physics dictate that both the diameter and working distance of a magnifier must decline as power increases. accordingly, the 20x system, while an excellent high-power magnifier, is relatively small and has a short working distance. the next step from the 20x hastings is a full microscope.
lens diameter: 15mm / 19/32"
field of view: 20mm / 13/16"
focal length: 25mm / 1"
working distance: 22mm / 7/8"
case dimensions: 3/4" h x 1 1/2" l