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Description
Celestron Rowe-Ackermann f/2.2 Schmidt Astrog... Overview
The Celestron 6" f/2.2 Rowe-Ackermann Schmidt Astrograph Telescope (RASA) is specifically designed for astrophotography and astro-imaging with a large aperture and fast focal ratio. Using three-element rare-earth optical glass lenses ensures accurate color rendition and eliminates aberrations such as coma and field curvatures. The improved StarBright XLT multicoating system, which includes antireflection coatings on the lenses and highly reflective coatings on the mirrors, increases light transmission throughout the entire optical path. An integrated fan reduces cooldown time and provides optimal airflow through the optical tube assembly (OTA) while filtering harmful dust from the interior.
The astrograph design is defined by its fast focal ratio, which reduces exposure times without sacrificing image quality and gives you more time for multiple shots of the same object for layering or with different filters. Its internal Ultra-Stable focusing mechanism enables very precise focusing to clearly resolve topographic details on the Moon or split double stars and reveal details of most other celestial objects in between, while minimizing unwanted lateral movement of the primary mirror when focusing or slewing. Since this OTA is designed as an imaging scope, the included 42mm camera adapter is compatible with most camera-specific T-rings.
- 152mm (6") diameter aperture enables near- and deep-sky viewing without being prohibitively large or heavy for easy transport to viewing locations
- 335mm focal length helps produce a fast focal ratio
- Fast f/2.2 focal ratio requires significantly lower exposure times versus slower ratios to produce the same results
- Rowe-Ackermann Schmidt astrograph (RASA) design is purpose-built for astrophotography and imaging performance, and is not recommended for visual use
- Proprietary StarBright XLT fully multicoated optical system
- Four-element rare-earth glass for true color rendition without aberrations across the entire field of view
- Wide 400-700nm spectral range improves images of deep space objects like galaxies and nebulae
- Image circle: 22mm (0.86")
- Resolution: 0.91 arcsec (Rayleigh), 0.76 arcsec (Dawes)
- Back focus: 17.5mm (0.98") with included camera adapter
- Optical window can be removed and replaced with optional filters such as a light pollution filter
- Integrated cooling fan brings optical system to ambient air temperature for better performance
- Runs on eight user-supplied AA batteries or optional 12 VDC power adapter
- Multilayer mirror coatings made from aluminum, SiO2 (silicon dioxide), and TiO2 (titanium dioxide)
- Reflectivity is flat across the light spectrum, for both astrophotography/astro-imaging
- Multilayer antireflective coatings made from MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide)
- High-transmission water white glass corrector lens with 97.4% light transmission
- Focusing system moves primary mirror forward and back to achieve tack-sharp images
- Ultra-stable design minimizes unwanted lateral movement of the primary mirror when focusing or slewing
- Fine adjustments for precise focusing, approximately 30 turns of the knob runs through the focus range
- OTA only, mount and tripod required for proper use
- Includes CG-5 dovetail plate for use on mount heads
- Weight: 8.4 pounds
Items Included
- Celestron 6" f/2.2 Rowe-Ackermann Schmidt Astrograph Telescope (OTA Only)
- 42mm Camera T-Adapter
- Filter Drawer with 2" Clear Filter
- Fan Battery Pack
- Limited 2-Year Manufacturer Warranty
Additional Resources
Celestron Rowe-Ackermann f/2.2 Schmidt Astrog... Specs
| Optical Design |
Schmidt Cassegrain
|
| Aperture |
152 mm / 6"
|
| Focal Length |
335 mm
|
| Focal Ratio |
f/2.2
|
| Focuser |
Internal
|
| Battery |
8x AA
|
| Weight |
8.4 lb / 3.8 kg (OTA)
|
| Optical Design |
Schmidt Cassegrain
|
| Aperture |
152 mm / 6"
|
| Focal Length |
335 mm
|
| Focal Ratio |
f/2.2
|
| Resolution |
0.91 Arcsec (Rayleigh)
0.76 Arcsec (Dawes) |
| Focuser |
Internal
|
| Diagonal |
No
|
| Finderscope |
No
|
| Mounting |
Dovetail
|
| Optical Tube Dimensions |
24 x 7" / 61 x 17.8 cm (Length x Diameter)
|
| Payload Capacity |
No
|
| Altitude Adjustment |
No
|
| Latitude Adjustment |
No
|
| Counterweight |
No
|
| Battery |
8x AA
|
| Adapter |
12 VDC
|
| Weight |
8.4 lb / 3.8 kg (OTA)
|
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Bulk Discount
| Quantity | Price |
| 2 | ₹ 259327.6 |
| 3-5 | ₹ 256681.4 |
| 5-10 | ₹ 251389.0 |
| 10+ | ₹ 246096.6 |
Bulk discount will be automatically applied during checkout based on quantity.