Askar F3.9 Full Frame Reducer for FRA400/FRA500
299,00 €
Extreme f/3.9 full-frame reducer for the FRA400 and FRA500 astrographs. Four-element design for dramatically reduced exposure times.
Description
<![CDATA[The Askar F3.9 Full Frame Reducer is designed for the FRA400 and FRA500 astrographs, pushing these already-fast instruments to an extreme f/3.9 focal ratio. The four-element optical design delivers full-frame sensor coverage with sharp stars across the field.
At f/3.9, exposure times are dramatically reduced, making this an excellent choice for capturing faint extended objects like large emission nebulae and molecular clouds. Compatible with both the FRA400 and FRA500.
Key Features
- Extreme f/3.9 focal ratio for ultra-fast imaging
- Four-element optical design
- Full-frame sensor coverage
- Compatible with FRA400 and FRA500
Specifications
| Resulting Focal Ratio | f/3.9 |
|---|---|
| Optical Design | 4 elements |
| Compatible With | Askar FRA400, FRA500 |
| Sensor Coverage | Full-frame |
| 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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