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Optical Glass Focal Length 15mm 28mm LED Optics Plano Convex Condenser Glass LED Lens 20mm

1pc Large Diameter 62mm Double Convex Lens Optical Glass Magnifying Glass Replaceable Lens Focal Length 150mm

Rainbow Prisma Triangular Prism Crystal Glass Photographic Prisme Color Prisms Physics Children's Experiment

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camera photography telescope mobile phone bracket can be connected to sight

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10mm 15mm 20mm 30mm K9 Optical Glass Right Angle Triangle Isosceles Prism Total Reflection Physical Experiment Ray Refraction

Physical Optical Experiment Box Three-Line Parallel Source Double Convex Cylindrical Double Concave Cylindrical Lens

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13mm 1W 3W Mini LED Lens 15 30 45 60 90 100 Degrees for IR CCTV COB Convex Lenes With Holder Reflector Collimator

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Optical Glass Triple Triangular Prism with Stand Physics Spectrum Tool Optical Element

1W 3W 5W LED Lens 20MM Optical PMMA Flat Transparent Lenses 5 10 15 30 45 60 90 120 Degree For 1 3 5 Watt High Power LED Chip

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230mm Optical PMMA Solar Focus Fresnel Lens Spotlight lens Plane Magnifying Glass Solar Condensing Lens Focal Length 110mm

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50mm aperture series refractive glued green film objective Achromatic lens Finderscope astronomical telescope accessories

Optical Glass Beam Splitter Plate 80x80x1.1mm 50T/50R 70T/30R 80T/20R For Lasers Spectrum Analysis Instruments

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Celestron Astronomical Telescope Accessories CG3 Equatorial Mount Elevation Screw For Celestron AstroMaster 90EQ 130EQ

1pcs 3x3x3mm 4x4x4mm 5x5x5mm 6x6x6mm 7x7x7mm 8x8x8mm Cube Optical Prism Science Photography Tesseract

FFW2 Frame Warmer Eyeglasses Heater Hot Air Heating Machine Two Step Temperature Setting

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110mm 160mm 200mm 250mm PVC Ring Hoop Refraction Reflection Astronomical Telescope Connecting To The Dovetail Plate