Askar SQA70 f/4.8 Quintuplet APO
Super Quintuplet Astrograph. High-quality quintuplet air-spaced ED glass Petzval Astrograph.
EXCELLENT STAR PERFORMANCE
The central star point has an RMS radius of less than 1.84 μm, and the star point at the corner is less than 2.4 μm. It also has excellent full-field illumination and MTF data.
PETZVAL STRUCTURE
Integrated self-flattened design, supporting a 44mm full-frame image circle, no need for additional flatteners, and no need for additional calculation of the back focus. Between 37mm and 68mm connection distance, users can directly use it for shooting after the OTA is in focus.
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STABLE LENS STRUCTURE DESIGN
70mm aperture, 336mm focal length, the native focal ratio is F4.8. Quintuplet air-spaced lens design, including 2 pieces of ED glass. The optical system of the SQA70 has been fully optimized, utilizing a special glass combination design paired with ED glass to achieve optimal results.
INTEGRATED TUBE RING
Integrated pair of tube ring sets, with a hollow design in the middle to reduce overall weight. Enlarged hand screws allow users to open and close the tube ring without additional tools. There are 4 M4 and M6 threaded holes on both sides of the tube ring, which are convenient for installing the base or dovetail plate and connecting different accessories. You can even set up another set of OTA for shooting.
The handle on the top of the tube ring is slotted with a multifunctional finder base, which can be used to install astronomical accessories.
FINDER BASES
On both sides of the focuser, there are two finder bases, which not only eliminate the need for disassembling when changing the position of the finder scope but also provide additional mounting positions for other astronomical accessories.
RETRACTABLE DEW SHIELD
The Dew shield is a retractable design that can be pulled out when used. It protects the lens from the impact of external and internal light and protects the lens itself.
DUAL-SPEED FOCUSER
The dual-speed rack-and-pinion 2.5-inch focuser is compatible with most motorized focusers on the market. The focusing travel is 32 mm, and the focuser tube is engraved with high-precision scales. The entire focuser barrel is CNC machined with an anti-reflective internal design and matting paint, providing extra measures to eliminate stray light.
360° ROTATOR
The rear of the focuser is equipped with a 360° high-precision rotator with a precision scale to allow the user to adjust and save the angle of rotation. It is also equipped with an edge-shaped locking screw for easy locking.
REAR-END ADAPTERS
The end of the SQA70 is equipped with a variety of adapters, all of which are toothed and ribbed, making it easy to rotate manually without slipping. The adapters are available in sizes M54, M48, and M42 and can be used to attach various accessories, such as cooled cameras.
HIGH-QUALITY MACHINING
The entire SQA70 tube is crafted using high-quality CNC machining with anodized and surface spray paint treatments. The top of the handle and the focuser are all designed with exclusive nameplates, demonstrating high-end quality.
OPTICAL PATH
The SQA70 is a quituplet air-spaced lens design, including 2 piece of ED glass.
SPOT DIAGRAM
