Apertura 75Q Refractor Telescope
Apertura 75Q Refractor Powered By SharpStar!
Designed specifically for astrophotography, the Apertura 75Q is a fully corrected quintuplet refractor. Using SharpStar's exceptional optics, you can expect near-perfect color correction and full-frame compatibility without the need for an external flattener. Couple this with the quality control and warranty provided by Apertura and you have a fantastic package for any beginner or experienced astrophotographer.
With 75 mm's worth of aperture, the Apertura 75Q is capable of resolving small details within galaxies and emission nebulae while also taking sweeping, wide-field shots of these targets. The Petzval design of this telescope implies no need for precise spacing to achieve a flat field. This is extremely beneficial for those using more advanced or obscure imaging components that are not brand-specific to one another. If you're using a dedicated OSC (one shot color) camera you can forget about the need for a filter drawer, as the Apertura 75Q has a spot to hold a 2" mounted filter conveniently built into it! A 1.25" Adapter is included so that you can add a 1.25" diagonal to this scope for visual use. This telescope does not support a 2" Diagonal due to the limited focus distance. This Petzval refractor has a short focal length of 405 mm. Weighing in at 6.8 pounds, the Apertura 75Q pairs nicely with nearly all EQ mounts (other than the smallest of the star trackers) and could be considered an extremely portable imaging system (if you're conscientious about the additional weight of other imaging components). The widely-known quality optics from SharpStar make this an ideal refractor for dedicated astrophotographers.
The Apertura 75Q Offers Everything You Need in a Refractor
When five elements of color-correcting glass, mindful and convenient design choices meet the legendary Apertura support and warranty you only get one thing: The Apertura 75Q, Powered by SharpStar!
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.
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!
