Technical data sheet
Askar 71F – 71mm f/6.9 Apochromatic Quadruplet Refractor
The Askar 71F is an apochromatic refractor designed specifically for astrophotography, featuring a quadruplet optical design with an integrated field flattener. With a 71mm aperture and a 490mm focal length, it offers a compact, ready-to-use system with no need for external flatteners.
Integrated flat-field optics
The optical assembly includes an integrated corrector element that eliminates field curvature, ensuring pinpoint stars to the edges of the sensor. This makes the 71F ideal for photographic configurations without the need for additional accessories.
Astrophotography performance
- Imaging of extended nebulae
- Medium-sized galaxies
- Wide star fields
- Deep-sky mosaics
f/6.9 focal ratio
The intermediate focal ratio offers a good balance between speed and aberration control, making it versatile for various types of astronomical subjects.
Sensor compatibility
The system is designed to cover sensors up to Full Frame, maintaining uniform performance across the entire sensor area.
Mechanical structure
Its compact and balanced construction makes it suitable for lightweight mounts and harmonic drives, ideal for portable or travel setups.
Key technical specifications
| Brand | Askar |
| Model | 71F |
| Aperture | 71 mm |
| Focal length | 490 mm |
| Focal ratio | f/6.9 |
| Optical design | Quadruplet with integrated field flattener |
Ideal for
- Deep-sky astrophotography
- Compact and portable setups
- Lightweight mounts
- High-quality wide-field imaging
Take advantage of free shipping across Italy for orders over €199.99!
Askar 71F – 71mm f/6.9 Apochromatic Quadruplet Refractor
The Askar 71F is an apochromatic refractor designed specifically for astrophotography, featuring a quadruplet optical design with an integrated field flattener. With a 71mm aperture and a 490mm focal length, it offers a compact, ready-to-use system with no need for external flatteners.
Integrated flat-field optics
The optical assembly includes an integrated corrector element that eliminates field curvature, ensuring pinpoint stars to the edges of the sensor. This makes the 71F ideal for photographic configurations without the need for additional accessories.
Astrophotography performance
- Imaging of extended nebulae
- Medium-sized galaxies
- Wide star fields
- Deep-sky mosaics
f/6.9 focal ratio
The intermediate focal ratio offers a good balance between speed and aberration control, making it versatile for various types of astronomical subjects.
Sensor compatibility
The system is designed to cover sensors up to Full Frame, maintaining uniform performance across the entire sensor area.
Mechanical structure
Its compact and balanced construction makes it suitable for lightweight mounts and harmonic drives, ideal for portable or travel setups.
Key technical specifications
| Brand | Askar |
| Model | 71F |
| Aperture | 71 mm |
| Focal length | 490 mm |
| Focal ratio | f/6.9 |
| Optical design | Quadruplet with integrated field flattener |
Ideal for
- Deep-sky astrophotography
- Compact and portable setups
- Lightweight mounts
- High-quality wide-field imaging
Take advantage of free shipping across Italy for orders over €199.99!
SKU:83301
Askar 71F – 71mm f/6.9 Flat-Field Quadruplet Apochromatic Refractor
- Regular price
- €699,00
- Sale price
- €699,00
- Regular price
-
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Paga in 3 rate da €233,00 senza interessi.
Askar 71F – 71mm f/6.9 Apochromatic Quadruplet Refractor
The Askar 71F is an apochromatic refractor designed specifically for astrophotography, featuring a quadruplet optical design with an integrated field flattener. With a 71mm aperture and a 490mm focal length, it offers a compact, ready-to-use system with no need for external flatteners.
Integrated flat-field optics
The optical assembly includes an integrated corrector element that eliminates field curvature, ensuring pinpoint stars to the edges of the sensor. This makes the 71F ideal for photographic configurations without the need for additional accessories.
Astrophotography performance
- Imaging of extended nebulae
- Medium-sized galaxies
- Wide star fields
- Deep-sky mosaics
f/6.9 focal ratio
The intermediate focal ratio offers a good balance between speed and aberration control, making it versatile for various types of astronomical subjects.
Sensor compatibility
The system is designed to cover sensors up to Full Frame, maintaining uniform performance across the entire sensor area.
Mechanical structure
Its compact and balanced construction makes it suitable for lightweight mounts and harmonic drives, ideal for portable or travel setups.
Key technical specifications
| Brand | Askar |
| Model | 71F |
| Aperture | 71 mm |
| Focal length | 490 mm |
| Focal ratio | f/6.9 |
| Optical design | Quadruplet with integrated field flattener |
Ideal for
- Deep-sky astrophotography
- Compact and portable setups
- Lightweight mounts
- High-quality wide-field imaging
Take advantage of free shipping across Italy for orders over €199.99!
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Terms and conditions
Terms and conditions
Paga in 3 rate da €233,00 senza interessi.