TAPAUVCK
1 x 60mm Green Multi-Layer Double Separation Lens for DIY Refractor Astronomical Telescope(D60F300)
20mm Neutral Density Filter C-Mount/SM1 Compatible, Optical with 0.01%-10% Transmittance,1PCS(5% Transmittance SM1 Thread)
30mm Diameter Glued Aperture Objective Lens - Refractive Astronomical Telescope, DIY Accessory...
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