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ZnSe Focus Lenses for Optical Welding Machines: Diameter 12mm to 28mm, Focal...

D150F900 Reflector Astronomical Telescope Spherical Primary Mirror & 35mm Secondary Mirror(Secondary 35mm)

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescopes - 20/25/35/40/70mm Options(42mm)

D60mm Glued Objective Lens - 60F410 Fused Blue-Coated Achromatic for Astronomical Telescopes(D62F600 blue film)

Gallium Arsenide Optical Lenses Sheet - GaAs Focusing (Multiple Focal Lengths Available)(25x38.1mm)

60mm Double Separated Multilayer Green Film Objective Lens for DIY Refracting Astronomical Telescopes(D60F700)

D70mm Refractive Achromatic Objective Lens for DIY Astronomical Telescope - 400mm, 280mm,...

D150F750 Reflector Astronomical Telescope Spherical Primary Mirror & 35mm Secondary 1pcs(Primary D150F750)

Multi-Purpose DIY Astronomical Telescope Lens Set for Xingtrang 704/705 - Convexoconcave Optical Lens(70x300)

Achromatic Lens with Green Film Glued D80mm for DIY Astronomical Telescope -...

D80mm Glued Green Film Achromatic Objective Lens for DIY Astronomical Telescope -...

D60mm Glued Objective Lens - 60F410 Fused Blue-Coated Achromatic for Astronomical Telescopes(D60F800 Green Film)

305mm Parabolic Newton Reflector Primary Mirror with 80mm Secondary - DIY Astronomical...

Gallium Arsenide Optical Lenses Sheet - GaAs Focusing (Multiple Focal Lengths Available)(25x63.5mm)

Fluoride Optical Lenses - BaF2 Infrared Window (Miscellaneous) 1 Piece (15 x 2 mm)

Achromatic Lens with Green Film Glued D80mm for DIY Astronomical Telescope -...

Neutral Density Optical Filter Sheet - 0.1-1.0, 400-1100nm Wavelength Range, 1 PCS(Square 50x50mmx0.6)

D70 70mm Double-Separation Single-Sided Blue Film Objective Lens for Astronomical Telescopes(D70F300)

D70 70mm Double-Separation Single-Sided Blue Film Objective Lens for Astronomical Telescopes(D70F900)

Neutral Density Optical Filter Sheet - 0.1-1.0, 400-1100nm Wavelength Range, 1 PCS(Round 12.5mmx0.4)

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

D40 Glued Achromatic Objective Lens 40mm Diameter, 205mm Focal Length, Adhesive Blue...

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescopes - 20/25/35/40/70mm Options(54mm)

Short Axis Secondary Mirror for DIY Astronomical Telescopes - Options 20/25/35/40/70 mm (95mm)

Germanium lens with AR+DLC coating for Optical/Thermal Imaging - 1PC(14.5x2.5mm 2-Sided AR Coating)

Neutral Density Optical Filter Sheet - 0.1-1.0, 400-1100nm Wavelength Range, 1 PCS(Round 25mmx0.7)

60mm Double Separated Multilayer Green Film Objective Lens for DIY Refracting Astronomical Telescopes(D60F800)

Multi-Purpose DIY Astronomical Telescope Lens Set for Xingtrang 704/705 - Convexoconcave Optical Lens(80x900)

High-Definition 154mm Double Separation Objective Lenses for Astronomical Telescopes(D154F750 Multilayer)

Germanium Lens with AR+DLC Coating for Optical/Thermal Imaging - 1PC(24x4mm Coating)