Askar
SQA55
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The Askar SQA55mm f/4.8 telescope is designed as a quintuplet air-spaced SD glass Petzval astrograph, making it perfect for both astrophotography and daytime photography enthusiasts. Its advanced optical system ensures stunning image quality, whether you're capturing the stars or landscapes.
This telescope features a quintuplet optical system that incorporates one SD glass element and one ED glass element. These elements work together to deliver a flat field with exceptional colour correction, resulting in sharp, accurate images across the frame.
With an on-axis star PSF (Point Spread Function) of 2.5μm and 4μm in the corners, the Askar SQA55mm ensures pinpoint stars and high-resolution images. The flat field design eliminates the need for a field flattener, allowing you to capture stunning astrophotography images without distortion.
Thanks to the Petzval lens structure, there's no need for complicated back focus calculations. Simply position your camera sensor between 50mm and 60mm from the rear M48 connection thread to achieve optimal performance for full-frame cameras.
The Askar SQA55mm comes equipped with a convenient lens hood that easily attaches to the lens barrel. When not in use, it can be reversed for compact storage, reducing the overall size of the telescope for easier transportation.
Whether you're capturing stunning night skies or beautiful daytime landscapes, the Askar SQA55mm f/4.8 telescope offers unparalleled performance. Its advanced design and optical quality make it a versatile choice for photographers of all kinds.
SQA55 Parameters |
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Aperture size |
55mm |
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Focal length |
264mm |
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Focal ratio |
f/4.8 |
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Objective lens |
Quintuplet petzval APO(One piece of SD glass, one piece of ED glass) |
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Format specifications |
44mm |
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Aperture blades |
14 pieces |
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Graded Aperture |
f/4.8-f/22 |
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Closest Focus Distance |
5m |
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Focusing mode |
Manual focus |
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Filter Diameter |
M67 |
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Total length |
316mm (inclulding dew shield); 244mm (without dew shield) |
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OTA weight |
1.84kg |
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Total weight (including handle & dovetail plate) |
2.18kg |
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Rear-end adapter |
M48*0.75 (with M48×0.75 filter thread) |
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Rear-end connection distance |
Support 50-60mm range (Recommended connection length is 55mm) |
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Standard package items |
a SQA55 OTA, a military-grade waterproof hand-carrying case |
Product Size Diagram |
SQA55 AFkit Electronic Focuser Assembly Diagram |
Promotional Video·Deep Space Astronomy |
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Askar SQA55 55mm f/4.8 Petzval Astrograph
SQA55
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