our first night out, we couldn't resist a peek at an old friend, the
Orion Nebula, M42. Using the supplied 24mm eyepiece gave us 98x
magnification [now supplied with 25mm / 94x]. The nebula's bright core
practically filled the view, bumpy, mottled and full of detail. At it's
heart, the main stars of the Trapezium cluster were beautifully split.
To be fair, the central portion of M42 is an easy target. Less the dimming tendrils of glowing gas that arc away from it. They were fascinating to follow and extended for quite some distance. We also liked the view of M42's fainter neighbour, De Mairan's Nebula, M43. It's classic comma shape was easy to see thanks to the contrast delivered by the C9.25's Starbright/XLT-coated optics." Pete Lawrence writing for BBC Sky at Night Magazine
The 9 1/4" was specifically designed for visual infinity focus when using 2" eyepieces and has an optimized baffle system to benefit astrophotography by minimizing vignetting at the edge of the field of view. Its longer primary focal length and lower magnification secondary mirror contribute to a flatter field of view at the focal plane and helps to further reduce optical aberrations.
Latest specification including Fastar/Hyperstar Compatibility.
This C9 1/4 optical system also includes StarBright® XLT coatings.
This version of the OTA is supplied with the CGX / Vixen / Sky-Watcher style dovetail.
For amateur astronomers seeking superior equatorial control and the ease of a precision computerized GOTO system, the HEQ5 PRO SynScan is your answer. The Sky-Watcher HEQ5 PRO SynScan is designed with the novice user in mind, but has plenty of scope for more advanced users. If you are looking for a solid, well-built, yet portable astrophotographic mount then this should be high on your list of possible choices.
Optical Design: Schmidt-Cassegrain
Aperture: 234.95 mm (9.25 in)
Focal Length: 2350 mm (92.52 in)
Focal Ratio: 10
Optical Tube: Aluminum
Eyepiece 1: 25 mm (0.98 in)
Magnification 1: 94 x
Star Diagonal: 1.25
Optical Coatings: StarBright / XLT
Secondary Mirror Obstruction: 3.35 in (85.09 mm)
Secondary Mirror Obstruction by Area: 13.1 %
Secondary Mirror Obstruction by Diameter: 36.2 %
Optical Tube Length: 22 in (558.8 mm)
Optical Tube Weight: 20 lb (9.07 kg)