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Achromatic Lens D40 for DIY Refractive Telescope Diameter 40 mm, Focal Length...

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

50x50mm Absorption Type Neutral Density Optical Filter - Glass Light Attenuation Sheet...

DIY Astronomical Telescope Lens Set for 70 mm and 80 Telescopes Convexoconcave...

Achromatic Lens D40 for DIY Refractive Telescope Diameter 40 mm, Focal Length...

Germanium Lens with AR+DLC Coating for Thermal Imager and Optical Applications - 1PCS(35x2mm AR+DLC)

D30 mm Bonded Lens for DIY Telescopes Achromatic with Optional Diameters and...

Bonded Lens D30 mm for DIY Telescopes Achromatic with Optional Diameters and...

DIY Astronomical Telescope Lens Set for 70 mm and 80 Telescopes Convexoconcave...

360 Degree Rotation Controller for Astronomical Telescopes Compatible Accessories M42, M48 and...

Telescope Accessory, Barlow Lens 3X Multi Coated Achromatic for Astronomy, Clearer Images...

Germanium lens with AR+DLC coating Imager thermometer viewing window Optical/Thermal 1 piece (50x3mm AR+DLC)

Germanium Lens with AR+DLC Coating for Thermal Imager and Optical Applications - 1PCS(30x3mm AR+DLC)

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

Germanium lens with DLC coating for optical and thermal imaging - 1...

Neutral Density Optical Filter Sheet - 12.5mm/25mm Diameter, H-K9L Glass, for Photography...

1 Accessory for Reflective Astronomical Telescope D150F1200 Improved Planetary Observation (D150F1200 Primary Mirror)

High-Transmittance 850nm Optical Glass Filter Lens - Visible Light Cut-Off, Narrowband for...

850nm High Transmission Optical Glass Filter Lens - Visible Light Cutting, Narrow...

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

1 x 60mm D60mm Blue Fused Coated Achromatic Lens for Astronomical Telescopes...

Germanium lens with DLC coating for optical and thermal imaging - 1...

Green Film Achromatic Lens Bonded D80 mm for DIY Astronomical Telescopes -...

Astronomical Reflector Telescope, Spherical Primary Mirror and 35mm Secondary - for Astronomy...

Bonded Lens D30 mm for DIY Telescopes Achromatic with Optional Diameters and...

D30 mm Bonded Lens for DIY Telescopes Achromatic with Optional Diameters and...

D60 mm Double Separated Multilayer Green Film Lens for DIY Refractor Astronomical Telescopes (D60F600)

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

Molybdenum Reflective Lens for High Intensity Engraving Machines, 20/25/30mm Diameter, 1 Unit,...

Zinc Selenide (ZnSe) Focusing Lens - 1 Piece Optical Welding Machine Accessories,...