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

1 Lens D60 mm - 60F410, Achromatic with Blue Cast Coating for...

90mm Refractive Astronomical Telescope, Dual Separation Lens - Focal Length: 500/900/1000mm (D90F1000 Blue Film)

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

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

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

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

High-Transmittance 850nm Optical Glass Filter Lens - Visible Light Cut-Off, Narrowband 1PCS(26x0.8mm)

1 x 60 mm refractive lens for astronomical telescopes with single-sided blue...

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

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

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

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Round D25mm Density0.2)

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

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Square WxL50x50mm Density0.7)

1pc D305F1200 305mm Newtonian Parabolic Reflector Primary Mirror with 80mm Secondary Mirror(D305F1200 Main Mirror)

1 x D80mm Green Film Glued Achromatic Lens for DIY Astronomical Telescopes...

1 x Newtonian D203F750 203 mm Parabolic Reflector Mirror with 70 Secondary...

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

1PCS Circular polarizer and optical polarizer, with a thickness of 2.5mm an...

Short Axis Secondary Mirror for DIY Reflection Astronomical Telescopes (Options 20/25/35/40/70mm Available)(65mm)

D70 70mm Double Separation Single Sided Blue Film Telescope Lens with Retaining Ring(D70F900)

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(2% Transmittance)

1 x Newtonian D203F750 203 mm Parabolic Reflector Mirror with 70 Secondary...

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

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(13% Transmittance)

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(0.1% Transmittance)

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

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Square WxL50x50mm Density1)

1 x 154mm High Definition Dual Separation Lens - 750mm/1200mm Focal Length...