- Quintuplet air-spaced lens design, including 2 pieces of SD glass. The central star point has an RMS radius of less than 1.6 um, and the star point at the corner is less than 2.5 um, showing a super-fine star point. It also has excellent fullfield illumination and MTF data.
- 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 40mm and 70mm connection distance, users can directly use it for shooting after the OTA is in focus.
- Dual-speed rack-and-pinion large 2.8-inch rigid focuser, which can be 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.
- The end of the SQA8S 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 M68, M54, and M48 and can be used to attach various accessories, such as full-frame cameras.
The new Askar SQA85 is a high-quality quintuplet air-spaced Petzval astrograph with two pieces of SD glass for superior star point performance. The central star point has an RMS radius of less than 1.6 um, and the star point at the corner is less than 2.5 um. It also has excellent full-field illumination and MTF data.
