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Celestron 36 cm Rowe-Ackermann Schmidt Astrograph (OTA Only)

  • mfr: 91077
  • SKU: 91077-CELESTRON
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Product highlights

  • 14" aperture
  • 790 mm focal length
  • Proprietary XLT coatings
  • Extended spectral range
  • 77.5 back-focus distance
  • Wide-field f/2.2 system
  • 4-element rare-earth glass
  • Custom engineered linear brass focuser bearing
  • FeatherTouch Micro Focus Knob

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$19.99

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Celestron 36 cm Rowe-Ackermann Schmidt Astrograph (OTA Only)

The Rowe-Ackermann Schmidt Astrograph (RASA), is a cost-effective optical system for space surveillance, Space Situational Awareness (SSA), other scientific applications, and advanced wide field astroimaging. It offers unprecedented value in aperture, speed, field of view, and optical performance. The 14" RASA design has a convenient external prime-focus image capture location with a flat focal plane, providing small spot sizes to the edge of a wide field. The result is images free of optical defects like field curvature, off-axis coma, and astigmatism.

High Quality

Celestron’s proprietary XLT coatings, consisting of high-transmission multi-coatings for lenses and high reflectivity aluminum coatings, ensure good light throughput for the optical system.

Superior

The 36 cm aperture version is the largest RASA Celestron manufactures; it is the biggest and fastest (f/2.2) optical instrument of its kind available “off-the-shelf.” Unlike most telescopes, which only focus visible light (400-700 nm), the RASA 36 cm focuses an extended spectral range (400-900 nm), allowing a brighter signal to be detected by a camera sensor. The RASA 36 cm also features a redesigned focus system, which ensures easy and stable focusing.

Extraordinary Astroimages

RASA 36 cm’s ample back-focus distance (77.5 mm) accommodates a wide variety of imaging sensors and so capturing impressive deep-sky astroimages is easier than ever with Celestron’s new Rowe-Ackermann Schmidt Astrograph, the perfect companion to today’s top DSLR or astronomical CCD cameras. This fast, wide-field f/2.2 system offers two huge advantages over traditional f/10 astroimaging: better apparent tracking and shorter exposures. That means you’ll create better-looking astroimages in a fraction of the time, even without the use of an autoguider. With CCD sensor sizes as large as film—or larger—the Schmidt Astrograph offers a 60.1 mm optimized image circle to capture pinpoint stars on the largest imaging chips. Combine this large image circle with a focal length of 790 mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting.

Optical Performance

The Rowe-Ackermann Schmidt Astrograph features newly designed optics with 4-element rare-earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle is unprecedented for an astrograph in this price range—or even that of a much more expensive instrument. The design also provides minimal vignetting.

Advanced Features

Advanced features like a custom engineered linear brass focuser bearing and FeatherTouch Micro Focus Knob allow you to make the fine adjustments you need to capture the perfect shot. The motor system specifically designed for the RASA 36 cm focuser is manufactured by Starlight Instruments. Meanwhile, an integrated cooling fan helps optics cool down to ambient temperature and pulls air through vents with micromesh to prevent dust ingress. Two sets of 2x threaded insert holes in the rear cell provide additional mounting options.

Flexible and Portable

Dual dovetail bars offer flexibility to mount the optical tube and conveniently attach additional accessories. Accomodates “CGE/Losmandy” style dovetails. Moving and mounting your optical tube is easy with the carrying handles on the rear cell.

Engineered as a complete astroimaging system, every component of the Rowe-Ackermann Schmidt Astrograph is optimized for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully-multicoated optical window or an optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly.

Specifications

Main
Aperture 14-inch/355mm
Finder Scope No Finderscope
Mount Design OTA (Optical Tube/No Mount)
Configuration Core
OTA Only OTA Only
Optical Design Rowe-Ackermann Schmidt

Questions

Customer Questions
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Returns

Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges. 
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days. 
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact [email protected] with your order number and a description of the damage. 
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at [email protected], or send us a message here.  
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead. 
If you ordered a kit, you must return all components and accessories to receive a full refund. 
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund. 
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900. 
Most items can be returned within 30 days for a full refund. Click here to read our full return policy. 

Shipping and Returns

Same Day Shipping

All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

Free Two-Day Shipping

We offer free expedited shipping on thousands of items within the continental USA (this does not include Alaska and Hawaii).

Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews

Celestron 36 cm Rowe-Ackermann Schmidt Astrograph (OTA Only)

Celestron 36 cm Rowe-Ackermann Schmidt Astrograph (OTA Only) SKU: 91077-CELESTRON

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