Askar 91F Flat-Field Quadruplet Astrograph
1 044,00 €
91mm quadruplet self-flattened astrograph — the largest in the F-series. More light gathering and resolution for both imaging and visual use.
Description
<![CDATA[The Askar 91F is the largest in the F-series — a 91mm quadruplet self-flattened astrograph suitable for both astrophotography and visual observation. The increased aperture compared to the 60F and 71F provides more light gathering and resolution.
The quadruplet design ensures a flat field with sharp stars from center to edge. An optional 0.75x reducer is available to speed up the system for imaging larger targets.
Key Features
- Quadruplet self-flattened design
- 91mm aperture — largest F-series
- Built-in flat-field correction
- Suitable for visual and astrophotography
- Optional 0.75x reducer available
Specifications
| Aperture | 91 mm |
|---|---|
| Optical Design | Quadruplet flat-field |
| Field Correction | 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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