Celestron 14" RASA Rowe-Ackermann Schmidt Astrograph Telescope OTA

Celestron 14" f/2.2 Rowe-Ackermann Schmidt Astrograph OTA

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Your Price: CAD21,067.62

Retail Price:CAD22,121.00

Your Savings:CAD1,053.38(5%)

Part Number: 91077

Availability: Special Order, Usually ships in 5-10 business days

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Description

Product Highlights

Patented Catadioptric Astrograph Design
790mm Focal Length/ f/2.2 Focal Ratio
StarBright XLT Optical Coating System
4-Element Rare-Earth Optical Glass

Representing the largest aperture in the RASA series, the Celestron 14" f/2.2 Rowe-Ackermann Schmidt Astrograph (RASA) is designed for photographing and imaging all kinds of celestial objects—even the dimmest galaxies and whispiest nebulae. The use of four-element rare-earth optical glass lenses ensures accurate color rendition and eliminates aberrations such as coma and field curvatures. The improved StarBright XLT multi-coating system, which includes anti-reflection 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, it has a massive 60.1mm (2.36") imaging circle that will cover large imaging sensors such as those on medium-format cameras, and a large 48mm camera T-adapter is included for easy camera mounting.

Optical Performance

Large 355.6mm (14") diameter aperture allows users to image dim deep-space objects
790mm focal length helps to 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 multi-coated optical system
Four-element rare-earth glass for true color rendition without aberrations across the entire field of view
Wide 400-900nm spectral range improves images of deep space objects like galaxies and nebulae
Extremely wide 60.1mm (2.36") imaging circle will completely cover today's larger camera sensors for full-frame images without vignetting
Resolution: 0.39 arcsec (Rayleigh), 0.36 arcsec (Dawes)
Back focus: 55mm (2.16") with included camera adapter, 77.5mm (3.05") from top of threaded collar
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 12VDC power adapter

StarBright XLT Coating System

Multi-layer mirror coatings made from layers of aluminum, SiO2 (silicon dioxide), and TiO2 (titanium dioxide)
Reflectivity is flat across the light spectrum, for both astrophotography/astro-imaging
Multi-layer anti-reflective coatings made from layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide)
High-transmission water white glass corrector lens with 97.4% light transmission

Focuser

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

Mounting

OTA only, mount and tripod required for proper use
Includes large CGE/Losmandy-D dovetail plate for use on larger more stable mount heads
Secondary CGE/Losmandy-D dovetail plate located on top of OTA for easy mounting of accessories like guidescopes and imaging gear
Weight: 75 pounds

Included Accessories

Large 48mm (1.89") T-adapter included for larger format cameras
Battery pack takes eight user-supplied AA batteries to power the integrated cooling fan

Specifications

Optical Design	Rowe-Ackermann Schmidt
Aperture	14.0" / 355.6mm
Focal Length	790mm
Focal Ratio	f/2.2
Back Focus	With included camera adapter: 2.16" / 55.0mm From top of threaded collar: 3.05" / 77.5mm
Eyepiece Barrel Diameter	N/A
Diagonal	None
Finderscope	None
Tripod	None
Mount Type	Losmandy-D/CGE dovetail plate
Power Requirement	8 x AA batteries 12VDC, 100mA power adapter
Dimensions	Length: 42.5" / 1079.5mm Diameter: 16.0" / 106.4mm
Weight	75.0.0 lb / 34.0 kg

In the Box

Celestron 14" f/2.2 Rowe-Ackermann Schmidt Astrograph (OTA Only)

48mm T-Adapter

Fan Battery Pack

Limited 2-Year Warranty

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Celestron 14" f/2.2 Rowe-Ackermann Schmidt Astrograph OTA

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