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Zinc Selenide (ZnSe) Focusing Lens - 1PCS Optical Welding Machine Accessory, 99.8%...

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

Gallium Arsenide Optical Lenses Sheet Focusing for Strong Light Applications, 1PCS, Multiple...

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

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

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

D70 70mm Double Separation Single Sided Blue Film Telescope Lens with Retaining Ring(D70F360)

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

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

D60 mm Double Separated Multilayer Green Film Lens for DIY Refractor Astronomical Telescopes (D60F300)

154mm High Definition Dual Separation Lens for Refractive Astronomical Telescopes (D154F750 Single-Layer)

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

Zinc Selenide (ZnSe) Focusing Lens - 1PCS Optical Welding Machine Accessory, 99.8%...

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

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

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

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

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

Short axis secondary mirror for DIY reflection astronomical telescopes (20 to 70...

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

Zinc Selenide (ZnSe) Focusing Lens - 1PCS Optical Welding Machine Accessory, 99.8%...

Secondary Mirror Short Axis for DIY Reflection Astronomical Telescopes (20-70mm Options Available)(38mm)

1 x D203F750 203mm Parabolic Newtonian Reflector Primary Mirror with 70mm Secondary...

D106F600 D106F900 Double Film Lens for Astronomical Telescopes - 106 mm Diameter...

Germanium lens with DLC coating for optical and thermal imaging - 1 Unit(30x2mm AR+DLC)

Germanium lens with DLC coating for optical and thermal imaging - 1 Unit(24x4mm AR+DLC)

Double Convex K9 Optical Glass Lens, Diameter 20-58mm, Focal Length 40-200mm(D45 F150 C7 E3)

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(70x2mm AR+DLC)

Germanium lens with AR+DLC coating for thermal imaging cameras and optical applications...