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50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(63% Transmittance)

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

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Square WxL50x50mm Density0.4)

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

High-Transmittance 850nm Optical Glass Filter Lens - Visible Light Cut-Off, Narrowband 1PCS(23x1.1mm)

D70 70mm Double Separation Single Sided Blue Film Telescope Lens with Retaining Ring(D70F800)

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

1pc D60mm Glued Objective Lens - 60F410 Fused Blue-Coated Achromatic for Astronomical...

1 Piece D106 106mm Refractive Lens for Astronomical Telescopes - Double Focal...

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

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

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

High-Precision Neutral Density Optical Filter Sheet 0.1-1.0, 1 PCS(Round D25mm Density1)

360 Degree Rotary Controller for Astronomical Telescopes (1 Pack) - Design Compatible...

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

1 x 60mm Green Multi-Layer Double Separation Lens for DIY Refractor Astronomical Telescope(D60F600)

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

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(0.001% Transmittance)

Newtonian D203F800 203mm 60mm Parabolic Reflector Mirror (Accessory for DIY Astronomical Telescope)(D203F800 Main Mirror)

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

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

50mm x Absorption-Type Neutral Density Optical Filter - Glass 1PCS(3% Transmittance)

20mm Neutral Density Filter C-Mount/SM1 Compatible, Optical with 0.01%-10% Transmittance,1PCS(0.1% Transmittance SM1 Thread)

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

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

1pc D131F1200 Double Separated Multi-Layer Green Film Objective - 131mm Caliber, 1200mm...

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

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

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

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