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D60mm Glued Objective Lens - 60F410 Fused Blue-Coated Achromatic for Astronomical Telescopes(D61F300 green film)

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

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

Molybdenum Reflective Lens for CO2 Engraving Machines, Diameter 20-38.1 mm, 1 Piece,...

Barium Fluoride Optical Lenses - Infrared BaF2 Window (Various) 1pcs(13x1mm)

Barium Fluoride Optical Lenses - Infrared BaF2 Window (Various) 1pcs(15x1mm)

60mm Double Separated Multilayer Green Film Objective Lens for DIY Refracting Astronomical Telescopes(D60F360)

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescopes - 20/25/35/40/70mm Options(30mm)

360 Degree Rotator Controller for Astronomical Telescopes - Accessories Compatible with M42,...

60mm Double Separated Multilayer Green Film Objective Lens for DIY Refracting Astronomical Telescopes(D60F300)

Barium Fluoride Optical Lenses - Infrared BaF2 Window (Various) 1pcs(50x3mm)

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

Molybdenum Reflector Lens for CO2 Machine Cutting - 20/25/30mm, 40W-100W Compatible 1pcs(25mm*3mm)

Gallium Arsenide Optical Lenses Sheet - GaAs Focusing (Multiple Focal Lengths Available)(25x88.9mm)

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescopes - 20/25/35/40/70mm Options(38mm)

D60mm Glued Objective Lens - 60F410 Fused Blue-Coated Achromatic for Astronomical Telescopes(D60F342 blue film)

Neutral Density Optical Filter Film - 0.1-1.0, Wavelength Range 400-1100nm, 1 Piece (Round 12.5mmx0.6)

Gallium Arsenide Optical Lenses Sheet - GaAs Focusing (Multiple Focal Lengths Available)(18x38.1mm)

850 NM High Transmittance Optical Glass Filter Lens - Narrowband Infrared Filter,...

20mm Neutral Density Filter with Mounting Bracket - C-Mount/SM1 Compatible Optical Filter,...

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescopes - 20/25/35/40/70mm Options(120mm)

Neutral Density Optical Filter Film - 0.1-1.0, Wavelength Range 400-1100nm, 1 Piece (Round 12.5mmx0.7)

High-Transmittance 850nm Optical s Filter Lens - Infrared Narrowband for Cameras-1pc(13.8x1mm)

High Transmission 850 nm Filter Lens - Infrared Narrowband Filter, 1 Piece...

D106 106mm Refracting Astronomical Telescope Objective Lens - Multi-layer Coated for Enhanced Clarity(Metal Holder)

Reflective molybdenum lens for CO2 engraving machines, diameter 20-38.1 mm, 1 piece,...

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

D203F750 203mm Parabolic Reflector Primary Mirror with 70mm Secondary 1pcs(70mm Mirror)

D154 F1200 HD Astronomical Telescope - 154mm Aperture, 1200mm Focal Length, Multi-Layer Coated Lens(D154mmF1200mm/Multifilm)

60mm Refractive Astronomical Telescope Objective Lens with Single-Sided Blue Film for DIY Telescopes 1pcs(D60F600)