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Telescope-Astrographs-Celestron 11" RASA Telescope OTA with Ultra Stable Focus System - V2

Telescope-Astrographs-Celestron 11" RASA Telescope OTA with Ultra Stable Focus System - V2 - Image 2

Telescope-Astrographs-Celestron 11" RASA Telescope OTA with Ultra Stable Focus System - V2 - Image 3

Telescope-Astrographs-Celestron 11″ RASA Telescope OTA with Ultra Stable Focus System – V2

Original price was: $2,199.50.Current price is: $879.80.

82 in stock

Categories: Astrographs, Telescopes Tags: arecibo telescope, Astrographs, best starter telescope, best telescopes for beginners, Celestron 11" RASA Telescope OTA with Ultra Stable Focus System - V2, hubble telescope pics, reflecting telescope, Telescope, telescope goldfish, telescoping flag pole

Overview

Engineered for Excellence: The Celestron RASA 11!

If you’re in the market to elevate your astrophotography game, the Rowe-Ackermann Schmidt Astrograph from Celestron is the solution. Offering an unbeatable native focal ratio of f/2.2, this Celestron 11” RASA is an astrophotographer’s dream! Couple this unrivaled light gathering power with the superior optical technology from Celestron and enjoy bright, astigmatism-free images. Perfect for deep space enthusiasts, the focal length of 620 mm is great for capturing a wide variety of celestial objects. Whether you plan to reveal intricate dust lanes within galaxies or exquisite structure in nebulae, this RASA 11 from Celestron is sure to take your images to the next level.

Designed for those serious about astroimaging, Celestron has carefully crafted this OTA to feature everything an astrophotographer wishes for. Not only is the light gathering power and speed impressive, but the optical elements within this RASA 11 provide an inherent flat field, razor sharp stars, and photos absent of aberration. In addition to this, rest assured knowing every bit of detail is being collected as the patented CelestronStarBright XLT coatings ensure maximum light transmission to your camera sensor. Celestron has also furnished their RASA series with mechanisms such as a smooth internal focuser and an integrated telescope cooling system to enhance your astrophotography experience even further. With qualities like these, Celestron delivers an astrograph that’s a cut above the rest!

The Unmatched Optical Design of the Celestron RASA

Taking the already incredible astrophotography performance of the Schmidt-Cassegrain optical design up a notch, Celestron has developed the Rowe-Ackermann Schmidt Astrograph for those serious in their imaging endeavors. RASA telescopes consist of a lens group, a Schmidt corrector plate, a primary mirror, and an optical window. After passing through the Schmidt corrector plate, the incoming light hits the primary mirror, then is redirected to the lens group. This lens group is composed of four elements of rare-earth material, correcting for field curvature, false color and aberration, and provides a significant reduction in vignetting. When it comes to speed, the RASA does not disappoint. These patented Rowe-Ackermann Schmidt Astrographs feature a native focal ratio of f/2.2—an outstanding improvement from standard f/10 Schmidt-Cassegrain telescopes! With a focal ratio this low, more light is able to be collected on your camera sensor in less time. This results in brighter, more detailed images and projects to be completed far quicker. For instance, a 30 second exposure with the RASA is equivalent in brightness to a ~10 minute exposure with an f/10 SCT. That’s 20x as fast! To enhance performance even further, Celestron has included enhanced aluminum coatings on the primary mirror, as well as their patented StarBright XLT coatings on the refractor elements for maximum light transmission to your camera sensor.

A Feature-Rich, Light Gathering Powerhouse

Celestron has loaded this telescope with features that are sure to help you reach new heights within your astrophotography journey. The unrivaled optical design allows you to collect bright, beautiful images, the added mechanics improve your image quality even more, and the plethora of optional and included accessories further elevate your nights under the stars. Thanks to the ingenuity from Celestron, you’re set up for success! Read more about this world-renowned astrograph below.

Large 11” Optics
This RASA 11 features a focal length of 620 mm, making it well suited for shots of your favorite nebulae, galaxies, and star clusters! Capture vivid images of the busy Sagittarius constellation, the hydrogen-rich Cygnus region, the Orion Molecular Cloud Complex, and plenty more. With the large 11” of aperture and wickedly fast f/2.2 focal ratio, copious amounts of photons are collected in a short amount of time. This feature is wonderful for completing imaging projects in a timely manner, especially for those who have limited clear sky time. In addition to this, the fast light gathering power and wide field of view is much less demanding on the telescope mount. In some cases, autoguiding may not even be required for sharp images!

Innovative Architecture
As the optics themselves perform exceptionally well, it’s necessary to have systems in place that help maximize image quality. With this in mind, Celestron has furnished the RASA optical assemblies with an internal focuser as well as a built-in fan! The Ultra-Stable Focus System (USFS) houses a precision linear ball bearing for minimal image shift while focusing. In addition to this, the upgraded focus design reduces the detrimental effects of mirror flop—that is—the unwanted movement of the primary mirror during different telescope positions. To aid in ventilation and healthy airflow, the 12V DC MagLev fan helps expel hot air from inside of the tube. This ensures the image is not degraded by distortions from heat plumes by bringing the optics down to ambient temperature.

Effortless Camera Attachment
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This 11” RASA is created specifically for astrophotography and functions solely as an astrograph, meaning it cannot be used visually. Including a large 43.3 mm image circle, this RASA 11 is compatible with full frame cameras! To get you started, Celestron has included two camera adapters: an M42 adapter for use with the majority of cameras with standard T-threads, and an M48 adapter for those with full frame sensors. This RASA 11 has a total backspacing requirement of 72.8 mm. With the attachment of either included camera adapter, the remaining backspacing distance needed is the 55 mm industry standard—making it easy to achieve with today’s most popular DSLRs and dedicated astro-cameras. If you’re looking to get the perfect angle on your desired target, these adapters also offer camera rotation. Simply loosen the retaining ring, rotate your camera, retighten the ring, and you’re all set!

Upgrade Your RASA With A Host of Additions
To help you get the most out of your RASA experience, numerous accessories are available to pair with this 11” astrograph. If you’re in need of a passive dew solution and looking to block stray light from entering your optics, the addition of the Apertura 11″ RASA Dew Shield is a great choice! If you’re wanting an active dew solution, the Celestron 11″ Dew Heater Ring warms the front corrector plate just enough to eliminated pesky dew. Wanting to streamline your setup routine? The Celestron Focus Motor offers hands-free, automatic focusing. With the help of software, this electronic focuser finds the exact focal point of your optics, making it a breeze to get ready for a night of imaging.

Everything You Need Right Out of the Box
As stated above, this RASA 11 comes readied with an M42 camera adapter as well as a M48 full frame camera adapter. These two inclusions make camera attachment quick and easy and help you get out and under the stars in no time! Also added are top and bottom CGE (Losmandy-D) style dovetail bars for mounting atop a wide variety of equatorial mounts, and for the addition of accessories. To make powering the built-in fan effortless, Celestron has added a battery pack that plugs into the 12V power port. Eight AA batteries (not included) power this fan, providing a convenient, compact power system.