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Amazon.com : Fotodiox Fresnel Reflector/Focusing Lens for Monolight LEDs - Compatible with Speedotron Bayonet Lights (Speedotron Black & Brown Line) : Electronics
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Amazon.com: 2-Pack Fresnel Lens Φ230mm(9.06") Focal Length 110/190mm Acrylic Ultrathin Magnifier for Solar Heating,Solar Concentrator,fire Starter,spot Lens,Visual Education (Focal Length 110mm) : Arts, Crafts & Sewing
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