SQA85
Askar
From $2,395.00
4 stores
The Askar SQA85 is a high quality quintuplet air-spaced SD glass Petzval astrograph designed to deliver stunning astrophotos. Five internal lens elements work together to eradicate coma, field curvature, and any other aberrations that may be present, with an inherent flat field that means stars are sharp all the way to the corners, even with full frame cameras. With an 85mm aperture, 408mm focal length, and f/4.8 focal ratio, the telescope delivers exceptional color correction while supporting a 44mm full-frame image circle without requiring additional flatteners. The optical tube assembly weighs approximately 3.64 kilograms, making it manageable for transport to different observation sites while its compact size doesn't compromise performance.
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Specifications
| Image Circle | 44 mm |
| Focuser Size | 2.8 in |
| Focal length | 408 mm |
| Back Focus Range | 40 mm |
| Warranty | 1 |
| Optical design | Quintuplet Petzval APO with 2x SD glass elements |
| Focuser Type | Dual-speed rack-and-pinion |
| Aperture | 85 mm |
| Focuser Travel | 32 mm |
| Edge Illumination | 85% |
| Tube Length (dew shield retracted) | 403 mm |
| Camera Adapters | M48, M54, M68 |
| Tube Length (dew shield extended) | 439 mm |
| Central Star RMS | 1.6 μm |
| OTA Weight | 3.64 lb |
| Focal ratio | f/4.8 |
| Corner Star RMS | 2.5 μm |
| Weight with Tube Ring and Dovetail | 4.62 kg |
| Recommended Back Focus | 55 mm |