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Lenses > LENSES, CYLINDRICAL, GLASS 10D 50X50MMTo focus light along a straight line. Useful for looking at full paths of rays on paper, such as pencils of light emerging from the slits of a comb illuminated by a small lamp. Made of optically true glass with polished faces and ground edges. Surfaces follow the sides of cylinder (s). Beveled edges. Plano-convex. Dimensions: (h x w), 50mm x 50mm. Power 10D (focal length 100mm)
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