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Alstar Astronomical 2"/M48-Extension Tube Kit
Sometimes you cannot get to the right focal plane for focusing with a camera or eyepiece. This extension tube kit solves this problem. Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.
Lightweight and Durable
All metal construction and anodizing aluminium process, resistant for long time use. High-quality aluminum material makes the product lighter and easier to carry.
Variable Form
The required spacing can be achieved by combining several extenders of differing lengths, you can use 1 piece, 2 pieces, 3 pieces or 4 pieces of the extension rings and you can also make random combinations out of order.
Inner Threaded Design
Effectively reduce stray light interference, not only improve the brightness of the image, but also effectively reduce the dark edges formed, the edge details of the image are clearer.
Stable Connection
The precise manufacturing process makes the telescopic tubes perfectly connected with each other, reinforcing the stability of the telescope and camera.
Jonathan Melendy
Reviewed in the United States on May 31, 2021
We used the Alstar 48mm extension set to increase the reduction of our telescope compressor by almost a full f-stop.
Richard Mcinnis
Reviewed in the United States on March 31, 2021
Great to have multiple spacers available when setting up rigs. They’ll come in handy.
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