Telescope-Refracting Telescopes-Apertura 75Q Refractor Telescope

Premium Hoya Glass
HOYA FCD-100 Glass is famously known for its incredibly low-light dispersion qualities and color-correcting abilities. Compared to a standard doublet refractor, or even a triplet, this 75 mm refractor will yield sharper, higher-contrast images and even better color-correction while not needing to add additional flatteners. At a focal ratio of f/5.4 at 405 mm, framing your favorite targets is a breeze. In addition, the Apertura 75Q pairs perfectly with APS-C sensors and is extremely well corrected for full-frame cameras.

Back Focus is not Critical with Petzval Designs
“Back focus” is the term used to describe the distance between the metal back of the telescope and the camera sensor. Meticulously spacing the camera out to this distance is typically critical not only to ensure that it can reach focus, but also to obtain the sharpest, brightest, best corrected image from the optics. Petzval optical designs are typically described as eliminating the need to calculate and space the back focus distance. However, this isn’t the whole story. Scopes of this design still need the camera sensor positioned at a suitable location that allows the camera to reach focus. What the Petzval design does eliminate is the need to exactly set the spacing for great optical performance: so long as your camera is spaced out enough to reach focus, the telescope will perform optimally. The Apertura 75Q is designed to have a back focal distance around the industry standard 55mm. This is the typical back focus of a DSLR with T-adapter, or cooled astronomy camera with its included adapters.

Integrated Filter Cell
Innovative build design is of top priority with any Apertura refractor. Built into the 75Q itself is a 2″ filter cell which allows you to easily add your favorite imaging filter into the optical train without disassembling your reducer or flattener. This filter cell is completely detachable and takes mere seconds to install. There is no need to even consider purchasing a third-party filter drawer with your dedicated OSC (one shot color) camera when you purchase the Apertura 75Q!

Adaptability
The Apertura 75Q comes electronic-autofocuser-ready out of the box! This flexibility allows you seamless integration of your favorite electronic focuser for a hands-free imaging session with the ASIAIR or other remote imaging systems.

Optional 0.75x Reducer
Improving upon the already outstanding optics, the addition of the optional 0.75x reducer turns this quintuplet refractor into a telescope of unrivaled quality! The focal length is brought down to 303 mm and the focal ratio is lowered to a speedy f/4. In comparison to the William Optics RedCat 61 with a similar focal length of 300mm, the Apertura 75Q paired with the 0.75x reducer offers 1.5x more light gathering power! Capture large regions of the sky within a single exposure, and produce stunning images brimming with clarity. Check out the Apertura 75Q Refractor and 0.75x Reducer Package we carry here at High Point Scientific.

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 and packaging!