Askar SQA55 Quintuplet Air-Spaced SD Glass Petzval Astrograph for Astrophotography and Daily Photography The Askar SQA55 is a versatile quintuplet air-spaced SD glass Petzval astrograph, expertly designed for both astrophotography and daily photography. This high-performance astrograph features a sophisticated optical design that ensures sharp, high-contrast images, whether you're capturing the wonders of the night sky or everyday scenes. With its advanced Petzval design, the Askar SQA55 offers exceptional color correction and field flatness, making it ideal for deep-sky imaging and detailed landscape photography. Its robust construction and premium SD glass elements guarantee outstanding image quality, free from chromatic aberrations and distortions. Compact and portable, the Askar SQA55 is perfect for photographers who require flexibility without compromising on performance. Whether you're an astronomy enthusiast or a professional photographer, this astrograph will elevate your imaging experience, providing stunning results across a wide range of applications. Specifications SQA55 Parameters Aperture size 55mm Focal length 264mm Focal ratio f/4.8 Objective lens Quintuplet petzval APO（One piece of SD glass, one piece of ED glass） Format specifications 44mm Aperture blades 14 pieces Graded Aperture f/4.8-f/22 Closest Focus Distance 5m Focusing mode Manual focus Filter Diameter M67 Total length 316mm (inclulding dew shield); 244mm (without dew shield) OTA weight 1.84kg Total weight (including handle & dovetail plate) 2.18kg Rear-end adapter M48*0.75 (with M48×0.75 filter thread) Rear-end connection distance Support 50-60mm range (Recommended connection length is 55mm) Standard package items a SQA55 OTA, a military-grade waterproof hand-carrying case
