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60mm Double Separated Multilayer Green Film Objective Lens for DIY Refracting Astronomical Telescopes(D60F400)

High-Definition 154mm Double Separation Objective Lenses for Astronomical Telescopes - 750mm/1200mm Focal...

Square Fresnel Lens 30x30 40x40 50x50 100x100mm PMMA Threaded DIY Projector Condenser Magnifier(40x40mm-FL70mm)

40-100mm PMMA Fresnel Lens, 60-80mm Focal Length Condenser Lens for Solar Heating, Optical Experiments,1pcs(50mmx60mm)

PMMA Flat Convex Lens for Zoom LED Flashlight 1pc(1pcx10mm biconvex)

PMMA Flat Convex Acrylic Lens 15-50mm For Zoom Flashlight Bike Lamp(1PCx44.8mm)

D40 Achromatic Objective Lens for DIY Astronomical Telescope - 40mm Diameter, 205mm...

FL28-120 Round Fresnel Lens 20-100 mm, Acrylic PMMA Condenser for LED Projector,...

Short Secondary Mirror for Reflective Astronomical Telescope DIY-Options 20/25/35/40/70mm(28mm)

Round Glass Projector Lens, Fresnel Lens 50-250 mm for Stage Lighting, Threaded Magnifier (D50mmxEFL40mm)

Round Fresnel Lens PMMA Threaded Condenser 20-70mm for LED Light Projector VR Optics(D50mm-FL50mm)

40-100mm PMMA Fresnel Lens, 60-80mm Focal Length Condenser Lens for Solar Heating, Optical Experiments,1pcs(100mmx60mm)

50-100mm Round PMMA Fresnel Lens Threaded Condenser for LED Light Projector VR Optical Experiments(D100mmxFL50mm)

70mm Optical PMMA Fresnel Lens, 30-80mm Focal Length, Solar Concentrator & Magnifier(50mm)

PMMA Flat Convex Lens for Zoom LED Flashlight 1pc(1pcx30mm)

10-38mm PMMA Convex Lens for Zoom Flashlight Bike Lamp Optical Acrylic Condenser

D30mm Glued Objective Lens for DIY Astronomical Telescopes - Achromatic with Blue/Green...

FL28-120 Round Fresnel Lens 20-100mm PMMA Acrylic Condenser for LED Spotlight DIY Projector VR,1pcs(70mmx60mm-01)

Fresnel lens PMMA 30mm, thickness 2mm, focal length 15mm, Short Round for optics

5Pcs PMMA Flat Convex Lens Set 10-38mm For Zoom LED Flashlight Bike Lamp(5pcsx44.8mm)

50-100mm Round PMMA Fresnel Lens Threaded Condenser for LED Light Projector VR Optical(D80mm-FL60mm)

60mm Separate Double Multilayer Green Film Lens for DIY Astronomical Telescopes Refractors (D60F300)

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescope - 20/25/35/40/70mm Options(45mm)

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescope - 20/25/35/40/70mm Options(50mm)

Fresnel Lens 100-300mm PMMA Threaded Condenser for Spotlight DIY Projector Optical Experiments(200mm-120mm-01)

D40 Achromatic Objective Lens for DIY Astronomical Telescope - 40mm Diameter, 205mm...

Fresnel Lens PMMA 40-100mm, Focal 40/50mm, Solar Condenser Hub, 2mm Round Acrylic, 1 pc(50mm-50mm)

Fresnel Lens 100-300mm PMMA Threaded Condenser for Spotlight DIY Projector Optical Experiments(300mm-200mm-01)

10-38mm PMMA Flat Convex Lens For Zoom LED Flashlight Bike Lamp(Clearx20mm)

10-38mm Flat Convex PMMA Lens For zoom LED torch bicycle lamp (clear...