Apertura 25mm Extension Tube with M117 Threads for Apertura 10" & 12" RC OTA
Apertura 25mm Extension Ring
with M117 Threads
This 25mm Extension Tube is designed for the Apertura 10" Ritchey-Chretien Astrograph, but it will also work with the Apertura 12" RC or any product that accepts M117 threads. It is meant to be placed between the telescope and the focuser to extend back focus by 25mm. You can stack different lengths of extension rings to achieve the back focus you require for your imaging set-up. With an extension added at this location, you won't have to extend the draw tube as far, which will minimize downward tilt with heavy loads.
All Apertura Extension Rings are machined of aluminum and then black-anodized.
This Product Comes with the Apertura Absolute Warranty!
- Two-Year Warranty against product defects.
- Three-Year Accident Replacement Program that begins after your initial 2 year warranty expires.
- Your Apertura Absolute Warranty is transferable.
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!