Askar 130PHQ Flatfield APO Astrograph
3 676,00 €
130mm f/7.7 quadruplet flatfield astrograph with 1000mm focal length. Built-in flattener eliminates external corrector complexity.
Description
<![CDATA[The Askar 130PHQ is a 130mm f/7.7 quadruplet flatfield astrograph — a step up from the popular 107PHQ with 23mm more aperture and 1000mm focal length. Its built-in field flattener eliminates the need for external flatteners, backfocus calculations, and complex adapter stacks.
The quadruplet optical design with two ED glass elements delivers excellent control of chromatic and other aberrations. The self-flattening design supports a medium-frame 60mm image circle with minimal star distortion at the edges. The central RMS spot radius is less than 2 microns, ensuring pinpoint stars across the field.
At 1000mm focal length, the 130PHQ excels at capturing fine detail in galaxies, planetary nebulae, and smaller deep-sky objects. Each unit is individually optically tested before shipping.
Key Features
- Built-in field flattener — no external accessories needed
- Quadruplet design with two ED glass elements
- 130mm aperture, 1000mm focal length (f/7.7)
- 60mm image circle for medium-frame coverage
- Central RMS spot radius under 2 microns
- Each unit individually optically tested
Specifications
| Aperture | 130 mm |
|---|---|
| Focal Length | 1000 mm |
| Focal Ratio | f/7.7 |
| Optical Design | Quadruplet with 2× ED glass |
| Image Circle | 60 mm |
| Field Flattener | Built-in |
| Brand | Askar |
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Explore these guides from our Astro Wiki to learn more about this type of equipment:
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