Celestron C11 User Manual

Last update:
2021/06/08
14:26
en:ost:telescope:c11_bedienung https://polaris.astro.physik.uni-potsdam.de/wiki/doku.php?id=en:ost:telescope:c11_bedienung
https://polaris.astro.physik.uni-potsdam.de/wiki/ Printed on 2021/08/26 08:47
Fig. 13: Dove tail on the tube
Fig. 14: CGE PRO clamp on the
mount
Fig. 15: Attachment of the C11
at the CGE PRO
Fig. 16: Tube with the cover Fig. 17: Tube with the sun
filter
Fig. 18: Telescope build up
completely
Start-up
The CGE PRO can simply switched on and off via the On/Off switch at the electronic box. In contrast
to the OST, the CGE PRO does not require any shutdown procedure. It simply can be switched off.
After the boot of the mount, it is almost always required to create a new alignment. The following
possibilities exist:
Two Star Align
One Star Align
Solar System Align
Quick-Align
Last Alignment
Re-Alignment
Unfortunately, the handling of the hand terminal of the CGE PRO is not as intuitive as the one of the
OST. However, after a short settling in period even an inexperienced user can safely handle this
mount.

Celestron C11 Specifications

General

Focal Length	2800 mm
Focal Ratio	f/10
Optical Design	Schmidt-Cassegrain
Highest Useful Magnification	660x
Lowest Useful Magnification	40x
Limiting Stellar Magnitude	14.7
Resolution (Dawes)	0.42 arc seconds
Light Gathering Power	1593x
Secondary Mirror Obstruction	95 mm
Secondary Mirror Obstruction by Diameter	34%
Aperture	279 mm (11 inches)
Resolution (Rayleigh)	0.5 arc seconds
Optical Tube Length	610 mm (24 in)
Mount Type	Varies by configuration
Weight	Varies by configuration
Star Diagonal	Not included (typically sold as OTA only)
Finderscope	Not included (typically sold as OTA only)
Eyepiece	Not included (typically sold as OTA only)