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Apertura 25mm Extension Tube with M117 Threads for Apertura 10 12 RC OTA
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Apertura 25mm Extension Tube with M117 Threads for Apertura 10" & 12" RC OTA

(7 Available)
SKU: APT-A-RC1025
$29.95
 
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The Apertura 25 mm Back-Focus Solution!

The Apertura 25 mm Extension Ring is designed for the Apertura 10” Ritchey-Chretien Astrograph. These extension rings are designed with adaptability in mind, allowing you the versatility to achieve precise back-focus lengths.

This extension ring features M117 threads and is designed to be placed between the telescope and the focuser, extending the back focus by 25 mm. Adding an extension ring at this location helps you avoid racking the focuser tube out too far, keeping your setup solid and reducing downward tilt even with heavier gear!

Image of 25 mm ring standing Click to Enlarge Image
Image of 25 mm ring laying down Click to Enlarge Image

Perfect Back Focus for your RC Telescopes

This Apertura extension tube is compatible with telescopes that accept M117 threads, offering durability and versatility when achieving your back spacing. Read more below!

Close up of 25 mm threading Click to Enlarge Image

Sleek and Stackable!
The Apertura 25 mm extension ring is made to pair perfectly with the Apertura 10” Ritchey-Chretien Astrograph, but will work with the Apertura 12" RC or any product that accepts M117 threads! Stack up as many rings as your rig requires for perfect back spacing. Each ring is crafted from sturdy aluminum and finished with a sleek black-anodized coat, so they look as good as they perform.

{{The Apertura AD8 comes with the Apertura Absolute Warranty! }} Click to Enlarge Image

Comes with the Apertura Absolute Warranty!
The Apertura Absolute Warranty provides two years of coverage against product defects. After the initial two-year warranty expires, this product qualifies for Apertura's Three-Year Accident Replacement Program. In addition, the Apertura Absolute Warranty is transferrable! Download a copy of the Apertura Absolute Warranty for more information on this program, how to make a claim, and why it is important to keep your original receipt and the product's original boxes & packaging!