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Celestron Advanced VX (AVX) 800 RASA 8 "telescope on GoTo mount

Telescope:

8-inch f / 2.0
Flat image field, free from optical errors such as field curvature, coma, astigmatism and chromatic aberration over the entire field of an APS-C sensor
NEW ultra-stable focusing system - six sealed precision ball bearings prevent mirror shifting
Integrated air cooling -12V DC MagLev fan with dust protection reduces the cooling time and ensures an optimal airflow
Internal filter holder - integrates an optional light pollution filter seamlessly into the light path
Extended spectral range of 390-800 nm, so that a brighter overall signal can be recorded

Mount:

The Advanced VX, the most compact and portable of Celestron's equatorial mounts. With a load capacity of 13.6 kg, the AVX carries the RASA 8 safely and vibration-free.
NEW: Dual dovetail rail, for EQ standard (CG-5) and 3 "standard (CGE)
Offers all functions that an astrophotographer needs: autoguider connection, permanent periodic error correction (PPEC) and adjustable tracking beyond the meridian and much more
Advanced VX mounts can be controlled via the PC connection on the hand controller using Celestron PWI Telescope Control Software
Including accessories: M42 camera adapter, C-mount camera adapter, battery holder for fans

Advanced VX (AVX) 800 RASA
RASA 8 "- Rowe-Ackermann Schmidt Astrograph
Celestron's transportable Astrograph, the 8 "Rowe-Ackermann Schmidt Astrograph (RASA), can take spectacular deep sky wide-angle images in seconds. This incredibly bright f / 2.0 system is the perfect telescope for modern astronomical CMOS color cameras, smaller CCD cameras and mirrorless cameras.

Thanks to the large opening ratio and the patented optical design, you can create sharp, detailed images and in many cases completely do without an autoguider. Weighing just 7.7 kg (17 pounds), it is easy to transport the 8 "RASA to the most remote locations.

RASA service for everyone
The 8 "RASA is a photography-only telescope that provides a flat field of view with no optical aberrations and thus shows extremely sharp stars over a large field of view. It enables astronomical images with an impressive" depth "and avoids the problems that typically arise Instruments with a longer focal length (and a slower aperture ratio) occur.

The latest addition to the RASA family with an 8 "opening is a much more portable and affordable version of the RASA 11, which was launched with great success in 2014. With the 8" RASA, the advantages of the RASA design can now be used by a large number of astrophotographers , It shares many features with its "big brother" RASA 11, including the integrated cooling system, the internal filter holder and the robust CGE dovetail mount.

The 8 "RASA is designed for photography only and cannot be used visually. The focal plane is located on the front of the optical system so that the telescope cannot accommodate a conventional eyepiece.

Shorter exposure times and virtual "real time" observation
Because it is an optical f / 2.0 system, astrophotographers can use shorter exposure times to capture details in weak objects. In combination with sensitive cameras and the right "live stacking" software, the 8 "RASA also enables almost live observations: You can view and stack the images immediately on a computer, making them brighter and more detailed than with the naked eye - even compared to much larger telescopes!

Since shorter exposure times are possible, your mount does not have to track with high precision over longer periods of time. The relatively short focal length of 400 mm of the 8 "RASA further reduces the requirements for tracking. In many cases, autoguiding is not necessary. With a weight of only 7.7 kg (17 pounds), this telescope fits perfectly with a variety of commercially available mounts ,

Ultra stable focusing system
With the introduction of the 8 "RASA, Celestron is introducing a new focusing mechanism that reduces the play of the primary mirror when focusing, panning or tracking the astrograph. Focusing is easier, more precise and more stable than ever. The key to this ultra-stable focusing system are two groups of Precision bearings that are precisely aligned and tested during assembly to achieve optimal results.

Unique optic design
The patented RASA design (US 2016/0299331 A1) consists of a Schmidt plate, primary mirror, lens group and optical window. The lens group consists of four elements and uses rare earths. In contrast to many other telescopes that only egg in visible light (400-700nm)ne good performance, the 8 "RASA is designed for a larger spectral range, from 390-800 nm. In this way, more light from the celestial objects can be collected and imaged sharply.

With many optical systems, it does not matter for the image quality whether another flat glass such as a filter is used. The situation is different with extremely bright systems like the RASA. Our developers have solved this problem by providing the RASA with an optical window that can be removed and replaced with a filter. In this way, the image quality remains at the highest level even if you use a filter or the camera has its own optical window. Celestron offers a filter against light pollution, which was specially developed for the 8 "RASA and which replaces the optical window.

All light-refractive optical surfaces are StarBright-XLT-coated, the main mirror has an improved aluminum coating. This ensures high transmission for the entire system. Compared to the HyperStar system for Schmidt-Cassegrains, the RASA 8 delivers better optical performance and superior illumination.

Developed for the most modern cameras
In contrast to the larger RASAs, which are optimized for DSLR and large CCD cameras, the 8 "model was developed for astronomical CMOS color cameras, smaller CCD cameras and mirrorless cameras. The telescope does not work due to the available back focus with commercially available DSLR cameras It is optimized for sensors with a diagonal of up to 22 mm and still offers good performance with sensors with a diagonal of up to 32 mm The sensors used in many mirrorless cameras are in APS-C format A good choice 42mm full frame sensors work in principle as well, but the performance at the edges of the sensor decreases noticeably and the field illumination is reduced.We also do not recommend that the RASA 8 with a camera housing with a diameter of more than 10cm to combine.

You can use the following table to determine whether your camera is compatible with RASA 8.

Camera compatible with RASA 8? Adapter required
Astronomical CMOS / CCD camera with C-Mount Yes C-Mount adapter (included)
Astronomical CMOS / CCD camera with M42 threaded connection Yes M42 adapter (included in delivery) with M42 intermediate ring (not included in delivery)
Astronomical CMOS / CCD camera with different connection Yes User-defined camera adapter
Mirrorless Canon with APS-C sensor Yes Camera adapter RASA 8 for Canon system cameras (# 820774, available separately)
Mirrorless Sony with APS-C sensor Yes Camera adapter RASA 8 for Sony system cameras (# 820773, available separately)
Mirrorless Canon with full frame (42mm) sensor Yes, but not optimized over the entire sensor. Camera adapter RASA 8 for Canon system cameras (# 820774, available separately)
Mirrorless Sony with full frame (42mm) sensor Yes, but not optimized across the entire sensor. Camera adapter RASA 8 for Sony system cameras (# 820773, sold separately)
DSLR No -

The Advanced VX mount
The Advanced VX telescopes set the standard for medium-sized telescopes. During the development of the mount, the requirements for astrophotography were taken into account. The Advanced VX offers many features of the large equatorial Celestron mounts, and at a very attractive price.

The Advanced VX is designed as the ideal platform for astrophotography with smaller telescopes. The sophisticated functions of our large equatorial mounts are now available for telescopes up to approx. 13; 6 kg (depending on the lever). Thanks to PEC (Periodic Error Correction), the periodic worm error that occurs with all mounts with a classic worm gear can be compensated, so that long-exposure shots are also possible. You can also track objects far beyond the meridian without having to turn around immediately. So you can watch the most interesting part of the sky without interruption. In addition, the Advanced VX has a much broader base than its predecessor, which increases the stability even with heavy loads. The improved engines have greater torque and can better compensate for a slight imbalance.

State-of-the-art technology for mobile use

Celestron Advanced VX mounts set the standard for medium-sized telescopes up to approx. 13.6 kg. During the development of the mount, the requirements for astrophotography were taken into account. It offers many properties of the large Celestron mounts at a very attractive price - and the axle cross weighs only 7.7 kg!

Solid cast parts and heavy-duty mechanics

Based on the tried-and-tested Advanced GT mount, the Advanced VX not only offers large, handy adjusting screws and more powerful motors that have an unevenly distributed Lcan get along even better, but also a wider base for the tripod connection and an improved dual dovetail mount with two clamping screws. No turning around prematurely! The tracking is possible up to 20 ° beyond the meridian passage.

State-of-the-art software

The AVX mount is supplied with the cold-resistant, much more powerful NexStar + hand controller. So you have a modern computer control at your disposal - with over 40,000 objects and German menu navigation. Thanks to the built-in clock, commissioning is even faster than before. The software moves to the reference stars automatically, you just have to center them in the eyepiece. Even the sun can serve as a reference object.

Advanced VX mounts can be controlled via the PC connection on the hand controller using Celestron PWI Telescope Control Software.

Northing made easy

With the AVX, you no longer have to laboriously set the Polarstern using the polar finder: Align the mount roughly to the north, carry out a 2-star alignment - and then call up the All-Star-Polar-Alignment. The software now helps you to position the mount precisely, even if you cannot see the Polarstern. You look comfortably through the telescope and do not have to kneel under the (optionally still available) polar finder.

Versatile to expand

In addition to a USB connection on the hand controller, the AVX also has an autoguider input and two AUX connections. Here you can connect additional, separately available expansion modules - for example the SkyQ Link module for control via WLAN with an iPhone / iPad / Windows PC or the StarSense module with which the mount automatically approaches and perfectly centers its reference stars.

Experienced photographers will appreciate how easily this mount can be transported to a dark observation area. If you are new to astronomy or astrophotography, the Advanced VX will help you get started and can serve you well for many years to come.

Avoid electronic damage - think of the right power supply!

For the correct operation of the device, please use only high-quality power supplies that also meet the specifications in astro- Outdoor use is sufficient - cheap power supplies often only supply the specified voltage and power at room temperature and, in the worst case, can even damage the electronics. Suitable high-quality power supplies can be found on the left under Optional accessories.

Including accessories:
The Advanced VX RASA 8 is supplied complete with an M42 camera adapter, C-mount camera adapter and a battery holder for fans.


MANUFACTURER Celestron
ITEM NUMBER (#) 821741
EAN CODE 4047825040350
MOUNTING Parallactic mount (motorized)
SOFTWARE FEATURES Celestron's Starry Night Special Edition Software, SkyPortal App
OPTICAL DESIGN RASA
OPENING (MM) 203mm (8 ")
MOUNTING CONTROL Computer controlled (GOTO)
FOCAL LENGTH 400mm (15.74 ")
Aperture ratio f / 2.0
IMAGE FIELD 22 mm (.86 ") Ø, 3.15 °
USEFUL FIELD 32mm (1.26 ") Ø, 4.6 °, only minimal loss of performance at the edge of the picture
REQUIRED BACK FOCUS 29mm from the front lens group / thread attachment, 25mm from the supplied camera adapters
RESOLUTION (DAWES) 0.57 arcseconds
RESOLUTION (RAYLEIGH) 0.68 arcseconds
VIEWFINDER Not included
ACCESSORY TRAY Yes
FOCUSER Ultra stable focusing system
POWER SUPPLY 12 VDC, 3.2 amps
LIGHT COLLECTION ASSETS (FOR HUMAN EYE) 843x
COMPENSATION StarBright XLT
TUBE LENGTH 628 mm (24.7 ") length | 235 mm (9.3") diameter
WAVELENGTH RANGE 390 - 800 nm
SPOT SIZE <4.6 μm RMS over the image circle
TUBE (MATERIAL) Aluminum
TUBE WEIGHT 17 lbs (7.7 kg)
SPECIAL FEATURES Air cooling system, integrated filter holder
DIAMETER TRIPOD LEG 50.8mm (2 ") heavy duty tripod legs with markings for easier adjustment
TRIPOD WEIGHT 18 lbs (8.16 kg)
MOTOR DRIVE DC servo motors with extremely low starting resistance, avoids voltage peaks
MOUNTING WEIGHT 17 lbs (7.71 kg)
COUNTERWEIGHTS 1 x 5 kg
TOTAL WEIGHT 47 lbs (21.31 kg)
CARRYING CAPACITY (KG) 30 lbs (13.6 kg)
POLE HEIGHT ADJUSTMENT 7 ° - 77 °
SWING SPEED 9 - max speed 4 ° / second
TRACKING SPEED Sidereal, sun and moon
Tracking modes EQ North & EQ South
HEIGHT (MM) 111.8 cm - 162.6 cm (44 "- 64") - mount and tripod
SWALLOW TAIL COMPATIBLE Dual saddle plate (Vixen and CGE)
NUMBER OF AUX PORTS 3 aux ports (1x hand control box port and 2x AUX port for optional accessories)
SWALLOW TAIL CGE dovetail clamp
USB PORT Yes
ALIGNMENT METHODS 2-Star Align, 1-Star Align, Solar System Align, Last Alignment, Quick Align
SCREW ERROR CONTROL (PPEC) Yes
HAND CONTROL BOX Two-line, 16-digit liquid crystal display; 19 fiber optically backlit LED buttons
DATABASE 40,000+ objects, 100 custom programmable objects. Improved information on over 200objects
INCL. ACCESSORIES Advanced VX mount head, tripod, accessory shelf, 1 x 5 kg counterweight, NexStar + hand control, DC power cable - is connected to the cigarette lighter socket