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

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(60mm)

60mm Refractive Astronomical Telescope Objective Lens with Single-Sided Blue Film for DIY Telescopes 1pcs(D60F500)

Germanium Lens with AR+DLC Coating for Optical/Thermal Imaging - 1PC(10x2mm 2-Sided AR Coating)

D203F800 203mm Parabolic Newton Reflector Primary Mirror with 60mm Secondary 1pcs(D203F800+60mm)

Parabolic Reflector Lens D114F450 for Astronomical Telescopes DIY, High Precision Primary 1...

Germanium Lens with AR+DLC Coating for Optical/Thermal Imaging - 1PC(60x2mm Coating)

60mm Refractive Astronomical Telescope Objective Lens with Single-Sided Blue Film for DIY Telescopes 1pcs(D60F900)

Neutral Density Optical Filter Sheet 0.1-1.0, Wavelength Range 400-1100nm, 1pc (Square 50x50mmx0.2)

D60mm Glued Objective Lens - 60F410 Fused Blue-Coated Achromatic for Astronomical Telescopes(D62F350 green film)

Barium Fluoride Optical Lenses - Infrared BaF2 Window (Various) 1pcs(30x4mm)

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

90mm Refractive Astronomical Telescope Double Separation Objective Lens(D90F900 Flued Lens)

Gallium Arsenide Optical Lenses Sheet - GaAs Focusing (Multiple Focal Lengths Available)(20x88.9mm)

Germanium Lens with AR+DLC Coating for Optical/Thermal Imaging - 1PC(15x1mm 2-Sided AR Coating)

20mm Neutral Density Filter with Mounting Bracket Optical Compatible C-Mount/SM1, Transmission 0.01%...

Multi-Purpose DIY Astronomical Telescope Lens Set for Xingtrang 704/705 - Convexoconcave Optical Lens(70x400)

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

Monocrystalline Silicon Infrared Lenses with Anti-Reflection Coating for Electronic Sensors - 3-5...

Barium Fluoride Optical Lenses - Infrared BaF2 Window (Various) 1 Piece (60x3mm)

Germanium Lens with AR+DLC Coating for Optical/Thermal Imaging - 1PC(40x2mm Coating)

Short-Axis Secondary Mirror for DIY Reflecting Astronomical Telescopes - 20/25/35/40/70mm Options(90mm)

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

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

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

D131F1200 Double Separated Multi-Layer Green Film Objective 131mm Caliber, 1200mm Focal Length, DIY Accessories

Sheet for Optical Gallium Arsenide Lenses - GaAs Focusing (Multiple Focal Lengths...

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

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