Telescope Optics Blank K9 Optical Float Glass Newtonian Primary Mirror DIY Lens Craft your own high-quality Newtonian reflector telescope with this precision-cut raw glass blank. Available in 153mm and 203mm diameters, this primary mirror blank is made from optical-grade K9 float glass, ideal for grinding and polishing into a custom telescope mirror. With excellent clarity, low internal stress, and stable thermal expansion, it's a top choice for amateur astronomers and optics enthusiasts building their own reflecting telescopes. Item: Telescope Objective Lens Type: DIY Telescope Parts Material: Glass Size: The thickness of float glass is 18.5mm, K9 glass Thickness about 20mm. Structure: Plano-convex Feature: K9 optical glass float glass Package Included: 1 x Pc Telescope Objective Lens .
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Prism Material: Optical glass. Full optical prism with FMC green film for better images. with copper protection ring for no harm to eyepieces.
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1x aluminum alloy tripod (non-retractable). 1x viewfinder scope. 1x zenith mirror. Don't worry about any installation issues.
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Parabolic Mirror. Parabolic mirror, aluminum plating and protective film. Focal Length 400mm. It suitable the secondary mirror short axis 35mm. Accuracy of the mirror: Above 1/4 wave.
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50 x 80mm Inspection Mirror.
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Item Type: 90 Degree Diagonal Mirror. 1 x 90 Degree Diagonal Mirror. Viewing Angle: 90 Degrees.
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1x aluminum alloy tripod (non-retractable). 1x viewfinder scope. 1x zenith mirror. Don't worry about any installation issues.
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Total width of the mirror 30mm. Non slip handle.
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