130mm Smith-Newton Telescope Window.

Name: 130mm Smith-Newton Telescope Window.
SKU: 39367
Price: 64.00 USD
Availability: InStock

130 mm diameter - Smith-Newton Telescope Window. "Donut" Optical Window. Central Hole.

Designed by Lambda Physics in Romania

2025-07-13T23:29:23.273Z-donut window.png

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130 mm diameter - Smith-Newton Telescope Window. "Donut" Optical Window. Central Hole.

What is it? 130 mm diameter - Smith-Newton Telescope Window. Optical Window. Central Hole. Optical Window Material: BK7 - Schott External Diameter: 130mm Hole Diameter: 30mm Thickness: 10mm Both sur…

What is it?

130 mm diameter - Smith-Newton Telescope Window. Optical Window. Central Hole. Optical Window

Material: BK7 - Schott

External Diameter: 130mm

Hole Diameter: 30mm

Thickness: 10mm

Both surfaces polished (Optical Grade).

It was designed and manufactured for a cathadioptric optical assembly, which was no longer made.

Some ideas: The optical part is aimed at astronomy enthusiasts who build their own telescopes. This window has polished, flat, and parallel surfaces. This window could be used as prefabricated blank for a primary mirror of a Cassegrain telescope or simply the entrance window for a Smith-Newton telescope.