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1pc D114F450 Parabolic Reflector Lens Primary and Secondary Mirror for DIY Accessories...

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Round D12.5mm Density1)

Light Filter for Black and White Cameras - Optical Glass Color Correcting...

Short Axis Secondary Mirror for DIY Reflection Astronomical Telescopes (Options 20/25/35/40/70mm Available)(56mm)

30mm Aperture Refractive Astronomical Lens 1 Piece Bonded Series DIY Accessory for...

D40 achromatic objective for refractive astronomical telescope (DIY): 40 mm diameter and...

High-Transmittance 850nm Optical Glass Filter Lens - Visible Light Cut-Off, Narrowband 1PCS(17.2x1.6mm)

90mm Refractive Astronomical Telescope, Dual Separation Lens - Focal Length: 500/900/1000mm (D90F900 Blue Film)

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(10% Transmittance)

20mm Neutral Density Filter C-Mount/SM1 Compatible, Optical with 0.01%-10% Transmittance,1PCS(10% Transmittance SM1 Thread)

1pc D150F750 Reflector Astronomical Telescope Spherical Primary Mirror & 35mm Secondary -...

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Square WxL50x50mm Density0.6)

High-Transmittance 850nm Optical Glass Filter Lens - Visible Light Cut-Off, Narrowband 1PCS(45x1mm)

1 Piece Accessories for D150F1200 Reflective Astronomical Telescope: 150mm Primary Mirror and...

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

Achromatic Lens D40 for DIY Refractive Astronomical Telescope - Diameter 40 mm,...

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(0.05% Transmittance)

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Round D12.5mm Density0.1)

Short Axis Secondary Mirror for DIY Reflection Astronomical Telescopes (Options 20/25/35/40/70mm Available)(75mm)

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Round D12.5mm Density0.4)

90mm Refractive Astronomical Telescope, Dual Separation Lens - Focal Length: 500/900/1000mm(D90F900 Flued Objective Lens)

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

Light Filter for Black and White Cameras - Optical Glass Color Correcting...

Newtonian D203F800 Parabolic Reflector Mirror 203 mm, 60 mm (Accessory for DIY...