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Convert Linear Fresnel Lens to a Spot Fresnel Lens DIY SPOT FRESNEL LENS

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Linear projection TV Fresnel lenses are actually Spot Fresnel lenses with Linear grooves on the Non-Fresnel side of the lens. Sanding and buffing away these lines can increase the clarity of a Linear lens and make it a SPOT FRESNEL LENS. GreenPowerScience.com
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