SCIENTISTS ONLY Fresnel Lenses Sheet Magnifier

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SCIENTISTS ONLY Fresnel Lenses Sheet Magnifier (Currently Not Available)

Price: $2.00

DANGER! DANGER! WARNING!

WARNING:
This is highly technical science
APPARATUS -- not for dummies!

Fresnel Lenses

SHEET MAGNIFIER
8x10 inches

A Fresnel lens replaces the curved surface of a conventional lens with a series of concentric grooves, molded into a surface of a thin, light-weight plastic sheet. The grooves act as individual refracting surfaces like tiny prisms when viewed in cross section, bending parallel ray in a very close approximation to a common focal length. Because the lens is thin, very little light is lost by absorption. Fresnel lenses can be used as magnifiers or projection lenses. However, there is a high level of distortion.

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SHIPPING AND HANDLING COST INCLUDE ALL OF THE FOLLOWING COST;

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SOME TIME AGO, THE NUMBER AND VARIETY OF THE ITEMS WE SELL BECAME TOO LARGE TO DETERMINE SHIPPING COST FOR. THE TIME REQUIRED TO RESEARCH SHIPPING COST AND THE DIFFICULTY IN GETTING THE INFORMATION TO THE BUYER EXCEEDED ALL OTHER LABOR COST COMBINED. TO RESOLVE THIS DIFFICULTY, WE CREATED A DATA BASE WHICH ACCUMULATED THE SHIPPING COST FOR EACH ITEM, DIVIDED THOSE COST BY THE NUMBER OF ITEMS SOLD AND CREATED A FIXED COST FOR SHIPPING AND HANDLING AS AN AVERAGE COST. THIS MEANS THAT SOME BUYERS WILL PAY MORE THAN THE ACTUAL COST OF SHIPPING AND HANDLING AND OTHERS WILL PAY LESS, BUT THE COST ARE LESS FOR EVERYBODY BECAUSE YOUR ORDER REQUIRES MUCH LESS TIME TO SHIP.
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