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

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

Germanium Lens with AR+DLC Coating for Thermal Imager and Optical Applications -...

Achromatic Lens Blue Fused 60F410 Coated D60mm for Astronomical Telescopes (D61.5F228 Green Film)

Newton D305F1200 Parabolic Reflector Primary Mirror, 305 mm Aperture, 1200 Focal Length,...

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

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

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

Germanium Lens with AR+DLC Coating - Optical/Thermal Image Thermometer Observation Window 1...

Germanium lens with AR+DLC coating Optical/Thermal Imager Thermometer Observation Window 1 piece...

1 x D203F800 203mm Parabolic Newtonian Reflector Primary Mirror with 60mm Secondary...

Double Convex K9 Optical Glass Lens, Diameter 20-58mm, Focal Length 40-200mm(D30 F50 C5.2 E2.2)

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

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

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

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

Gallium Arsenide Optical Lenses, Leaf Focusing Lenses for Strong Light Applications, Pack...

Gallium Arsenide Optical Lenses, Leaf Focusing Lenses for Strong Light Applications, Pack...

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

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

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

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

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

Secondary Mirror Short Axis for DIY Reflection Astronomical Telescopes (20-70mm Options Available)(30mm)

Germanium Lens with DLC Coating for Optical and Thermal Imaging - 1...

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

Gallium Arsenide Optical Lenses, Blade Focus Lenses for Strong Light Applications, 1...

Telescope Accessory, 1.25 Eyepiece Barlow Lens Aluminium Alloy 5X Astronomical Inch

Germanium Lens with AR+DLC Coating for Thermal Imagers and Optical Applications -...

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