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This
high-quality GSO extension tube can be inserted into any 2" telescope
focuser to gain an additional 50mm (1.97") of back-focus travel. With
this, eyepieces and accessories that you may not have been able to use
because your telescope tube was too short are usable again!
Lack
of sufficient back-focus travel is a common problem with many of
today's fast f-ratio telescopes, especially if you have a low profile
focuser or a short telescope tube that is optimized for binoviewer
viewing. The 50mm extension tube alleviates this problem. This tube can
also be used with 1.25" accessories with the use of commonly available
1.25"-2" adapters (sold separately).
This
practical and inexpensive adapter is made from precision machined
aluminum and is black anodized. It includes a brass compression ring
that clamps around the inserted eyepiece or accessory. Because the
set-screw does not come in direct contact with your eyepiece or
diagonal, their barrel will not be scratched or dented. The inside
surface of this tube is black-matted to enhance contrast by reducing
stray light reflections and is threaded to accept standard 2" telescope
filters.
Total length = 85mm (3.35"), Extension provided = 50mm (1.97"), Weight = 4.9 oz. Made in Taiwan.
If you have any comments or reviews you'd like to share with us, please email us. Thank you.
Photos and description copyright Agena
AstroProducts (2007). Reproduction without permission prohibited.
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