Askar SQA70 Pro 70mm f/4.6 Sextuplet APO

A 6-Element Petzval System with SD and ED Glass

The SQA70 Pro is built around a sextuplet (6-element) air-spaced Petzval APO optical design. With this Petzval design, no back focus calculation is required. To ensure high-contrast images with minimal false color, the design incorporates one SD (Super-low Dispersion) element as the second lens and one ED (Extra-low Dispersion) element as the fourth, providing improved chromatic correction and more consistent star images.

Full-Frame 44mm Imaging Circle at f/4.6

Designed specifically for astrophotography, the SQA70 Pro illuminates a 44mm image circle, providing full coverage for cameras with full-frame and smaller sensors. The fast f/4.6 focal ratio gathers significant light in shorter exposures, a critical advantage for capturing faint details in large emission nebulae like the North America Nebula (NGC 7000) or sprawling star fields in the Milky Way. At a 322mm focal length, you can frame these enormous celestial structures in their entirety.

Flexible 36-68mm Back Focus and M42/M48/M54 Adapters

The Petzval design simplifies your imaging train by eliminating the need for precise back focus spacing. Your camera can be placed anywhere within a generous 36mm to 68mm range from the rear adapter, with 55mm being the recommended distance for optimal results. The rear of the telescope includes M42, M48, and M54 adapters, giving you flexible connection options for a wide variety of cameras and accessories. For added convenience, the M48 adapter has a built-in M48x0.75 thread for direct installation of 2-inch filters.

A 3kg Portable Astrograph Design

Engineered for portability, the Askar SQA70 Pro features a compact optical tube that is only 331mm long and weighs just 3kg. This light weight makes it easy to transport and set up at a dark sky site. A fixed dew shield blocks stray light and gives physical protection to the optical tube, and the telescope includes a tube ring, a dovetail plate and a durable Oxford cloth case for safe storage and transport.

SQA70 Pro vs. SQA70: An Upgraded Optical Path

The SQA70 Pro is a direct evolution of the original Askar SQA70, with key upgrades centered on the optical design. While both are portable astrographs, the Pro model advances the formula in several ways.

• Optical Formula: The SQA70 Pro moves to an upgraded sextuplet air-spaced design for improved optical performance.
• Special Glass: It incorporates both SD and ED glass elements (in the second and fourth positions, respectively) for improved chromatic correction and more consistent star images.