Askar FRA400 Flatfield Refractive Astrograph
1 321,00 €
The original FRA series flatfield refractive astrograph. 400mm focal length with built-in flat-field correction — the scope that started it all.
Description
<![CDATA[The Askar FRA400 is the original member of the acclaimed FRA (Flat-field Refractive Astrograph) series. With built-in flat-field correction and a fast focal ratio at 400mm focal length, it pioneered the concept of affordable, high-quality flatfield astrographs.
The FRA design means no external field flattener is needed — simply connect your camera and start imaging. Excellent for wide-field astrophotography and doubles as a premium telephoto lens for daytime use.
Key Features
- Original FRA series design
- Built-in flat-field correction
- 400mm focal length with fast focal ratio
- No external flattener needed
- Dual-use: astrophotography and daytime telephoto
Specifications
| Focal Length | 400 mm |
|---|---|
| Focal Ratio | f/5.6 |
| Optical Design | Flatfield refractive |
| Field Correction | Built-in |
| Brand | Askar |
]]>
Explore these guides from our Astro Wiki to learn more about this type of equipment:
Reviews
There are no reviews yet.