erecting prism

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Noun1.erecting prism - a right-angled optical prism used to turn an inverted image upright
optical prism, prism - optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
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(4) Price includes 1 1/4-inch erecting prism and 20-mm eyepiece.
Compact wide-field refractors
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