Apertura 25mm Extension Tube for GSO 6" & 8" RC
Apertura 25mm Extension Tube for 6" & 8" GSO RC Astrographs
The Apertura 25 mm Extension tube is designed for the 6" & 8" GSO RC Astrographs. These extension rings are designed with adaptability in mind, allowing you the versatility to achieve precise back-focus lengths.
This extension tube features female M90 threads on one end and male M90 threads on the other. This Apertura tube ring 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!
Perfect Back Focus for your RC Telescopes
This Apertura extension tube is compatible with telescopes that accept M90 threads, offering durability and versatility when achieving your back spacing. Read more below!
Sleek and Stackable!
The Apertura 25 mm extension tube is made to pair perfectly with 6" & 8" GSO
RC Astrographs, or any product that accepts M90 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.
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!