Let’s Dive into Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope
The night sky has always held a deep fascination for me, and after years of using smaller telescopes, I decided it was time for an upgrade. The Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope promised to deliver high-definition views and astrograph-quality images, pushing my observational capabilities to new heights. This optical tube assembly is a serious piece of equipment for both visual astronomy and astrophotography, and I was eager to see if it lived up to the hype.
I yearned for a telescope that could resolve finer details in deep-sky objects and planets, something my previous 8-inch scope struggled with. I needed an instrument that provided both stunning visual views and the capability to capture breathtaking astrophotos. The promise of a flat field and minimized aberrations made the Celestron EdgeHD 1100 particularly appealing.
Unboxing the Celestron EdgeHD 1100 was an experience in itself; the OTA arrived well-protected, and my initial impression was one of impressive build quality. The optical tube felt solid and well-constructed, indicative of Celestron’s attention to detail, and the blue-grey metallic finish was sleek and professional. Its weight of approximately 27 pounds felt manageable, although it definitely requires a robust mount.
I considered the Meade LX200 ACF 10″ and the Explore Scientific 127mm ED APO refractor, but I opted for the Celestron EdgeHD 1100 because it offered a larger aperture than the Meade and superior portability compared to the Explore Scientific refractor. Plus, the EdgeHD system’s promise of a flat field across a large sensor was a huge draw for my astrophotography aspirations.
I was excited and anxious, hoping that the Celestron EdgeHD 1100 would deliver the crisp, clear images I’d been dreaming of. This telescope represented a significant investment, and I hoped it would open up a whole new realm of astronomical observing and imaging.
Real-World Testing: Putting Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope to the Test
First Use Experience
My first light with the Celestron EdgeHD 1100 was at a dark sky site about two hours from my home, far from city light pollution. I aimed it at Saturn and was immediately impressed by the sharpness and contrast of the image, far surpassing what I had experienced with my previous telescope. The Cassini division was clearly visible, and I could even make out subtle cloud bands on the planet’s surface.
During testing, I encountered a dewing issue due to the high humidity, a common problem with Schmidt-Cassegrain telescopes. I quickly addressed this by using a dew shield and a Kendrick dew heater system, which solved the problem and allowed me to continue observing and imaging. Using the telescope proved straightforward, but the sheer size of the 11″ OTA necessitated fine-tuning the balance on my equatorial mount.
My first night out yielded exceptional views, but I noticed some slight image shift when focusing at high magnification. This was a bit disconcerting at first, but I learned to compensate for it by carefully adjusting the focus knob and allowing the image to settle.
Extended Use & Reliability
After several months of regular use, the Celestron EdgeHD 1100 has proven to be a reliable and capable instrument. Despite its large aperture, the OTA has held collimation well, and the StarBright XLT coatings have consistently delivered bright, high-contrast images. The telescope has been exposed to temperatures ranging from 30°F to 90°F, and it has performed admirably in all conditions.
So far, I’ve not observed any significant wear and tear, although I am careful to protect the optics from dust and moisture when not in use. Cleaning the corrector plate requires extra care, and I only use a high-quality microfiber cloth and lens cleaning solution to avoid scratching the delicate coatings. Compared to my older telescope, the Celestron EdgeHD 1100 offers significantly better image quality and light-gathering ability.
The Celestron EdgeHD 1100 requires minimal maintenance; I periodically check the collimation and clean the optics. Storing the telescope properly in a padded case protects it from physical damage and keeps dust out.
Breaking Down the Features of Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope
Specifications
The Celestron EdgeHD 1100 11″ Optical Tube Assembly boasts an 11-inch (280 mm) aperture, offering exceptional light-gathering capabilities for detailed observations. Its focal length is 2800 mm (f/10), making it well-suited for both planetary and deep-sky viewing, as well as astrophotography. This makes the telescope incredibly versatile.
The OTA utilizes Celestron’s StarBright XLT coatings, enhancing light transmission and maximizing image brightness and contrast. The optical design is the EdgeHD Schmidt-Cassegrain, which provides a flat field of view, minimizing distortions and aberrations across the entire image plane. Equipped with tube vents and an integrated 60-micron mesh filter to reduce cooling time while keeping dust out.
The optical tube is constructed from lightweight aluminum, reducing the overall weight of the OTA without sacrificing durability. At approximately 27 pounds, the OTA is manageable for transport and setup but still requires a sturdy mount. This is essential for stability and accurate tracking. Includes a 23mm Axiom 2″ eyepiece (122x), a 9×50 finderscope, and a 2″ diagonal for comfortable viewing.
Performance & Functionality
The Celestron EdgeHD 1100 performs exceptionally well, delivering sharp, high-contrast images with minimal aberrations. Its large aperture allows for detailed observations of faint deep-sky objects, such as galaxies, nebulae, and star clusters. The EdgeHD optics provide a flat field, ensuring that stars remain sharp and well-defined across the entire field of view.
However, the EdgeHD 1100 can be sensitive to atmospheric seeing conditions, and image quality can degrade on nights with poor seeing. The long focal length (2800mm) makes it more challenging to locate faint objects, particularly for beginners. The performance of the scope meets and exceeds expectations for both visual and astrophotography.
Design & Ergonomics
The Celestron EdgeHD 1100 features a well-designed and robust optical tube assembly. The aluminum construction ensures durability while keeping the weight manageable. The placement of the focus knob is intuitive and allows for precise adjustments.
However, the sheer size of the 11-inch OTA can make it difficult to handle, especially in windy conditions. The scope requires a substantial mount to provide stable and accurate tracking. The design is user-friendly, but there is a slight learning curve to master the focusing, collimation, and balancing.
Durability & Maintenance
The Celestron EdgeHD 1100 is built to last, with high-quality materials and robust construction. The aluminum optical tube is resistant to corrosion, and the StarBright XLT coatings are designed to withstand years of use. The lifespan should be decades, with proper care and maintenance.
Cleaning the corrector plate requires extra care to avoid scratching the coatings, while keeping the optics protected from dust and moisture ensures optimal performance. Regular collimation checks are necessary to maintain image quality, and the procedure is relatively straightforward. Overall, this scope is very maintainable.
Accessories and Customization Options
The Celestron EdgeHD 1100 is compatible with a wide range of accessories, including different eyepieces, filters, and cameras. The Fastar compatibility allows for ultra-fast f/2 imaging, although this requires a separate lens assembly. Adding a focal reducer can decrease the focal length for wide-field imaging.
Celestron also offers a dedicated 0.7x reducer lens specifically designed for the EdgeHD series, which is highly recommended for astrophotography. The scope is compatible with most standard dovetail mounting systems, making it easy to attach to a variety of mounts from different manufacturers. The versatility in accessories and customization makes this scope adaptable to various needs.
Pros and Cons of Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope
Pros
- Offers exceptional image quality with minimal aberrations thanks to the EdgeHD optics.
- Provides excellent light-gathering ability with an 11-inch aperture, enabling detailed observations of faint objects.
- Features StarBright XLT coatings that enhance light transmission and maximize image brightness and contrast.
- Includes tube vents with integrated filters that reduce cooling time and prevent dust from entering the OTA.
- Offers Fastar compatibility, allowing for ultra-fast f/2 imaging.
Cons
- Can be sensitive to atmospheric seeing conditions, which can affect image quality.
- The long focal length (2800mm) can make it challenging to locate faint objects.
- Dewing can be an issue in humid conditions, requiring the use of a dew shield and heater.
Who Should Buy Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope?
The Celestron EdgeHD 1100 is perfect for serious amateur astronomers and astrophotographers looking for high-performance optics. It is well-suited for experienced observers who want to explore deep-sky objects and capture detailed images of planets. This telescope is also ideal for astronomy clubs and educational institutions.
Beginners should skip this product due to its complexity and high cost. It requires a significant investment in a robust mount and accessories. If you do not have experience with telescope collimation, it may not be the right choice.
A high-quality equatorial mount, a dew shield with a heater, and a dedicated focal reducer are must-have accessories. Additional eyepieces and filters can further enhance the observing experience.
Conclusion on Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope
The Celestron EdgeHD 1100 11″ Optical Tube Assembly 91050-XLT OTA Schmidt Cassegrain Telescope is a powerful and versatile instrument that delivers exceptional performance. Its EdgeHD optics provide sharp, high-contrast images with minimal aberrations, making it well-suited for both visual astronomy and astrophotography. While the telescope does require a significant investment in terms of both cost and supporting equipment, the image quality and versatility justify the price for serious astronomy enthusiasts.
Given its capabilities, the price of $4499 is justified for those seeking top-tier optical performance. This telescope represents a long-term investment in my passion, and I’m confident that it will continue to provide breathtaking views of the cosmos for years to come.
I wholeheartedly recommend the Celestron EdgeHD 1100 to anyone serious about astronomy and astrophotography, urging them to experience the wonders of the universe in high definition. Take the plunge and witness the cosmos like never before!