Askar SQA85

Askar SQA85: High-Quality Quintuplet Petzval APO Astrograph Aperture and Focal Length: Features an 85mm aperture with a 408mm focal length, delivering a fast f/4.8 focal ratio ideal for wide-field astrophotography. Optical Design: Incorporates a quintuplet Petzval design with two SD (Super ED) glass elements, ensuring exceptional color correction and sharpness across the entire field. Full-Frame Compatibility: Designed to support full-frame sensors, providing a large image circle suitable for advanced imaging setups. Compact and Lightweight: Measuring 403mm in length (dew shield retracted) and weighing 3.64kg, it's portable and convenient for field use. Versatile Connectivity: Equipped with M48, M54, and M68 adapters, accommodating various camera and accessory attachments. Optimal Back Focus: Supports a back focus range of 40-70mm, with a recommended connection length of 55mm for optimal performance. Included Accessories: Comes with an Oxford cloth case for protection and easy transport. The Askar SQA85 is a premium astrograph designed for astrophotographers seeking high-quality imaging performance in a compact and versatile package.             Specifications SQA85 Parameters Aperture size 85mm Focal length 408mm Focal ratio f/4.8 Objective lens Quintuplet petzval APO（including two pieces of SD glass） Total length 403mm(when the dew shield is contracted) 439mm(when the dew shield is stretched) Format specifications Full-frame OTA weight 3.64kg Gross weight（including tube ring and dovetail plate） 4.62kg Rear-end thread type M48/M54/M68 adapters Rear-end connection distance Support 40-70mm range (Recommended connection length is 55mm) Standard package items a SQA85 OTA, an Oxford cloth case