23% Off

Celestron 6" Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly with Starbright XLT Coatings

SKU: CN91071 MFR: 91071
Earn VIP Reward Points

Key Features

  • Capture stunning astrophotos with the Celestron 6" Rowe-Ackermann Schmidt Astrograph.
  • Enjoy superior optical quality with StarBright XLT coatings for brighter, clearer images.
  • The wide field of view on this telescope lets you image large nebulae and galaxies easily.
  • Integrated air-cooling system reduces thermal currents for optimal telescope performance.
  • Lightweight and portable design makes this telescope ideal for astrophotography on the go.
  • Achieve pinpoint stars to the edge of the field with advanced Rowe-Ackermann Schmidt optics.
See More Product Details
On Backorder?Expected Availability: 09/2025
Free Shipping

See Options

Qty
1

Protect your gear with Adorama Protect.* Learn more

2 Year

$99.99

3 Year

$119.99

4 Year

$154.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Reviews about this item

Review Summary

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

Celestron RASA 6 Specifications

  • Material

    Aluminum

  • Optical Design

    Rowe-Ackermann Schmidt Astrograph

  • Aperture

    5.98" (152mm)

  • Focal Length

    13.18" (335mm)

  • Focal Ratio

    f/2.2

  • Central obstruction diameter

    3.03" (77mm) (46% of aperture diameter)

  • Light Gathering Power

    472x (Compared to human eye)

  • Resolution

    Rayleigh: 0.91 arc seconds
    Dawes: 0.76 arc seconds

  • Image Circle

    0.63" (16mm) , 2.74 Degree

  • Useable field

    0.86" (22mm) , 3.76 Degree , only minimal performance loss at edge of FOV

  • Wavelength range

    400 - 700nm

  • Spot size

    < 1.5 microm RMS across image circle

  • Optical Coatings

    StarBright XLT

  • Off-axis Illumination

    91% at 0.31" (8mm) off-axis

  • Back focus with included camera adapter

    0.69" (17.5mm)

  • Focuser

    Standard Schmidt-Cassegrain focuser

  • Finderscope

    Not included

  • Other Features

    Air-cooling system, integrated filter mount

  • Dovetail

    CG-5 Dovetail Bar

  • Filter Drawer

    Accept 2" format filters, includes 1.25" filter adapter

  • Clear Filter

    2" filter, removable, AR coatings, 2mm glass thickness

  • Cooling Fan

    12V DC, MagLev

  • Camera Mounting Threads

    M42

  • Dimensions (Dia. X L)

    7 x 24" (177.8 x 609.6mm)

  • Weight

    8.4 lbs (3.8kg)

  • UPC Code

    050234910712

About Celestron RASA 6

Meet the Rowe-Ackermann Schmidt Astrograph (RASA) 6-a compact powerhouse that delivers spectacular astroimages, anywhere. Engineered with ultra-fast f/2.2 optics, the smallest member of the RASA family proves that you don't have to sacrifice performance for portability. Whether you're chasing dark skies in remote locations or elevating your backyard setup, RASA 6 opens the door to new possibilities.

RASA Performance for Everyone
For astrophotographers who demand speed, precision, and convenience in a compact package, the 6" RASA is the ultimate tool. Its f/2.2 design dramatically shortens exposure times, making it easier to capture crisp, detailed images of faint deep-sky objects without the heavy burden of extended tracking.

Since RASA technology debuted in 2014, it has become the trusted choice for space surveillance and satellite tracking, relied upon by defense contractors, professional researchers, and governments alike. Like its bigger brothers, RASA 6 features a flat field for sharp stars from edge to edge. With RASA 6, you get the same technology trusted by the pros, but at a price that's within reach for most, including those looking to add a second grab-and-go astrograph to their arsenal.

RASA 6 defies the limitations of smaller and slower instruments. It collects more light and provides higher resolution than the refractors in its price range, allowing you to capture faint details in galaxies, nebulae, and star clusters in less time.

Shorter Exposures for a "Near-Real Time" Experience
The magic of RASA 6 is in its speed. Its blazing f/2.2 optics mean that even faint objects can be imaged in short exposures. When paired with sensitive cameras and live-stacking software on your laptop, you can create an almost real-time imaging experience. Bright, detailed images appear on your laptop screen in just a few short exposures.

The system's ultra-fast focal ratio also eases the tracking demands on your mount. Since it allows using much shorter sub-exposures, you won't need to use an autoguider in many instances, so you'll spend less time dealing with equipment and more time exploring the universe.

RASA Optical Design: Engineering Excellence
The patented Rowe-Ackermann Schmidt optical design sets RASA 6 apart from other systems. This design features:

• A Schmidt corrector and a high-precision primary mirror that work in tandem to minimize optical aberrations
• A specialized three-element lens group using rare-earth glass, which ensures that more of the light emitted from celestial objects is sharply focused onto your sensor
• A removable 2" clear filter - engineered to maintain peak f/2.2 performance when you add a filter, as no extra glass is added into the light path
• StarBright XLT coating system for all refractive and reflective surfaces, guaranteeing maximum light transmission and superior field illumination
• The RASA optical design provides better overall performance and field illumination than a Schmidt-Cassegrain in the Fastar-style configuration
• Can be used with sensors up to 22mm diagonal to provide a wide 3.8 Degree while delivering sub-arcsecond resolution

Advanced Features & Versatility
Designed with the modern astroimager in mind, RASA 6 is loaded with features that enhance usability and adaptability:

Built-in Filter System
The integrated filter drawer accepts both 1.25" and 2" filters, giving you the flexibility to use various imaging filters. The removable 2" clear filter (i.e. optical window) allows you to add optional filters if desired, without introducing additional glass into the optical path that could compromise performance at f/2.2.

Integrated Cooling System
A 12V MagLev fan pulls air through mesh vents to rapidly cool the system to the ambient temperature to provide best images while keeping internal components dust-free.

M42 Camera adapter
The included camera adapter for the RASA 6 features standard M42 threads, making it easy to mount a wide variety of astronomical CMOS cameras.

Enhance your setup
To achieve the highest level of performance, we strongly recommend pairing this telescope with the Focus Motor, 6" Aluminum Dew Shield, 6" Dew Ring, and 6" RASA bag (all sold separately). The Focus Motor allows you to achieve sharp, precise focus electronically from the same computer used to control your camera. For dew prevention during long imaging sessions, the dew shield or dew ring will help keep your optics clear, especially in humid conditions. When your telescope is not in use, store your RASA in this protected, portable, grab-and-go case.

Advanced VX Mount & Intelligent Control
The RASA 6 is perfectly paired with the Advanced VX mount, Celestron's smallest and most versatile GoTo German equatorial mount. This mount is engineered to deliver:

Rock-Solid Stability
With a payload capacity of up to 30 lb, Advanced VX is a rigid, stable platform even when loaded with additional accessories like StarSense Autoguider (for long sub-exposures), dew prevention, or a focus motor.

Innovative Control Features
Equipped with All-Star Polar Alignment and permanently programmable periodic error correction (PPEC), the Advanced VX mount makes aligning and tracking effortless.

Its computerized GoTo capability, accessible via the NexStar+ hand control, lets you quickly locate and track celestial objects with intuitive menu-driven operations-ideal both beginners and experienced astronomers alike.

Together, the RASA 6 and Advanced VX form a synergistic system capable of delivering high-quality images in a truly portable design.

CPWI Software Integration
Every advanced imaging system needs equally advanced software, and this kit comes with Celestron PWI Telescope Control Software-a comprehensive software solution co-developed with PlaneWave Instruments. With CPWI, you gain:

• A graphical planetarium interface featuring PointXP advanced mount modeling, allowing you to add over 100 alignment points for pinpoint accuracy
• Seamless integration with ASCOM, providing control of your Advanced VX mount from a wide range of third-party applications
• Features perfect for observatory setups, such as saving and reloading your alignment and automatically parking your scope

A Universe of Possibilities in a Compact Package
The 6" RASA offers the perfect blend of speed, precision, and portability. Its game-changing optical design and robust mechanical features empower you to capture the night sky like never before. Embrace a grab-and-go astrograph that opens up a big, boundless universe.

Lightning-Fast Imaging
RASA's legendary ultra-fast f/2.2 optics let you capture deep-sky images with briefer sub-exposures and less total exposure time -often eliminating the need for autoguiding.

Mobile But Mighty
Weighing just 8.4 lb and featuring a versatile CG-5 dovetail, the RASA 6 is ready to image wherever you are.

Sub-Arcsecond Potential
With advanced optics capable of sub-arcsecond resolution, RASA 6 perfectly pairs with a high-resolution camera and favorable sky conditions to reveal fine structures in galaxies and nebulae.

Expansive Field of View
Designed for sensors up to 22mm diagonal, RASA 6 offers a generous 3.8 Degree view that effortlessly frames wide celestial targets.

Maximized Light Throughput
Celestron's proprietary XLT coatings ensure every image bursts with brightness and contrast.

Convenience & Customization
With built-in features like a filter drawer and cooling fan-and optional upgrades-RASA 6 adapts to your evolving astroimaging needs.

Celestron RASA 6 Features

  • Ultra-fast f/2.2 optics capture deep-sky images in shorter exposures
  • Compact 8.4 lb design offers extreme portability with pro-grade results
  • Sub-arcsecond resolution reveals ultra-fine galactic and nebular details
  • Flat field delivers pinpoint stars across the entire imaging sensor
  • Wide 3.8 Degree field of view ideal for capturing large celestial targets
  • XLT optical coatings maximize light transmission and image brightness
  • Integrated drawer accepts 1.25" or 2" filters without image distortion
  • 12V cooling fan maintains optimal performance and keeps optics dust-free
  • M42 adapter supports a wide range of astrophotography CMOS cameras
  • Engineered to pair with CG-5 dovetail mounts for stable imaging sessions

Warranty Information

This product has a limited warranty of 24 months for parts and 24 months for labor.

Product Documents

User Manual

Key Features

  • Capture stunning astrophotos with the Celestron 6" Rowe-Ackermann Schmidt Astrograph.
  • Enjoy superior optical quality with StarBright XLT coatings for brighter, clearer images.
  • The wide field of view on this telescope lets you image large nebulae and galaxies easily.
  • Integrated air-cooling system reduces thermal currents for optimal telescope performance.
  • Lightweight and portable design makes this telescope ideal for astrophotography on the go.
  • Achieve pinpoint stars to the edge of the field with advanced Rowe-Ackermann Schmidt optics.

What's in the box:

  • Celestron 6" Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly
  • 42mm (1.65") T-Thread Camera Adapter
  • Fan Battery Pack
  • Filter Drawer with 2" Clear Filter
  • Celestron 2 Year Limited Warranty