Askar SQA55 vs RedCat 51

Astrophotography content creator Cuiv The Lazy Geek has conducted an in-depth review of the Askar SQA55 telescope, a compact astrograph designed to rival the popular RedCat 51. In his analysis, Cuiv explores the telescope’s features, performance, and usability, ultimately declaring it one of the best astrophotography refractors he has reviewed.

Is the Askar SQA55 another RedCat killer?

The Askar SQA55 features a 55mm aperture and a 264mm focal length at a focal ratio of f/4.8, closely matching the specifications of the RedCat 51 while providing a slightly larger aperture. Priced at $800, it undercuts the RedCat 51 by $100, offering budget-conscious astrophotographers a compelling alternative. Cuiv praises the design, which includes a retractable lens hood, dual dovetail plates, a rotating camera assembly, and support for both APS-C and full-frame sensors. He particularly highlights its Petzval optical design, which eliminates the need for precise back-focus adjustments—a feature that simplifies setup and ensures high-quality imaging.

Cuiv tested the Askar SQA55 with two cameras: a ZWO ASI2600MC (APSC sensor) and the Touptek SkyEye 24AC (full-frame sensor). Using a standard 55mm back-focus spacing, he collected one hour of data on each camera. The results revealed excellent star shapes across the field of view, even at the corners of the full-frame sensor—a notable achievement for a telescope in this price range. He also found the telescope performed exceptionally well without needing to stop down the aperture for astrophotography, maintaining sharpness and clarity at its native f/4.8.

The review highlights several features that enhance the SQA55’s usability. The telescope’s fine focus adjustment, which Cuiv tested using a Bahtinov mask, offers precise control for achieving sharp images. The dual focus rings—one for coarse adjustments and the other for fine-tuning—work seamlessly, even without an electronic focuser. However, Cuiv notes that adding a ZWO EAF or similar device would require a separate timing belt, an accessory not included with the telescope.

Standout features of the Askar SQA55

One standout feature of the Askar SQA55 is its built-in aperture ring, allowing users to stop down the telescope to as narrow as f/22 for non-astrophotography purposes. While this versatility is appreciated, Cuiv emphasizes that its native wide-open performance is more than sufficient for astrophotography. He also appreciates the ability to easily insert filters into the optical path via the M48 adapter, simplifying workflows for users who rely on UV/IR cut or narrowband filters.

Despite its strengths, the SQA55 has some minor drawbacks. Cuiv points out that installing an electronic focuser prevents the telescope from fitting back into its carrying case—a design oversight that reduces its portability for advanced users. Additionally, while the telescope’s lightweight construction and ergonomic design make it easy to handle, its lack of a whimsical aesthetic, such as the RedCat 51’s signature smiling cat logo, might deter some hobbyists who value visual flair.

In comparing the Askar SQA55 to the RedCat 51, Cuiv concludes that the SQA55 holds its own as a serious competitor. While the RedCat's cult following and aesthetic appeal remain strong selling points, the SQA55’s optical performance, practical features, and affordability make it a compelling option for astrophotographers seeking a high-quality, compact refractor. Cuiv’s review underscores the SQA55’s versatility, noting its ability to serve as both an astrograph and a photography lens for terrestrial imaging.

Ultimately, Cuiv’s review positions the Askar SQA55 as a viable "Redcat killer," particularly for those prioritizing optical performance and value. The telescope’s thoughtful design, ease of use, and competitive pricing ensure it will find a place in the kits of amateur and professional astrophotographers alike.