The Bahtinov mask has become the preferred method for focusing telescopes. It is reassuring to have a Bahtinov mask that is lightweight, durable and can obtain a clear field of view.

For this purpose, we have specially designed a hard and long-lasting SV228 Bahtinov Mask Telescope Focusing Cover 156mm that will not become brittle even in cold environments.

Its frame is made of 2mm aluminum material, and the mask is made of optical-grade acrylic plastic. It is light and soft, can focus perfectly, protects the lens from scratches, and will not add burden to the objective lens.

Let's see its parameters

Outside Diameter:162mm

Inner Diameter:156mm

Bahtinov Mask diameter：140mm

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