Instruction manual

84
CCD IMAGING
Fastar Lens Assembly Option --
Using your Ultima 2000 telescope at f/1.95 with optional PixCel
CCD Camera
Your Ultima 2000 telescope is equipped with a removable secondary mirror that allows you to convert
your f/10 telescope into an f/1.95 imaging system capable of exposure times 25 times shorter than those
needed with a f/10 system! Used with Celestron's PixCel CCD System, objects will be easily found due to
the ultra-wide 2/3• by 1/2• field of view provided. With the optional Fastar lens assembly you can easily
convert your Fastar compatible telescope to f/1.95 prime focus use in a matter of seconds. Your telescope
can now be used in many different f-number’s for CCD imaging. It can be used at f/1.95 (with optional
Fastar Lens Assembly), f/6.3 (with the optional reducer corrector), f/10, and f/20 (with the optional 2x
barlow) making it one of the most versatile imaging systems available today. This makes the system ideal
for imaging deep sky objects as well as planetary detail. The key to the Fastar’s versatility is the variety of
different F-numbers in which it can be used. Described below is the significance of each F-number and the
type of object best suited to that kind of imaging.
Figure 9-2
The above figure shows how the secondary mirror is removed when using the optional PixCel CCD camera
at f/1.95 and the Fastar lens assembly.
Warning
:
The secondary mirror should never be removed
unless installing the optional Fastar lens assembly.
Adjustments to collimation can easily be made by
turning the screws on the top of the secondary mirror mount without ever having to remove the secondary
mirror (see Telescope Maintenance section of this manual).
Secondary
Mirror
Secondary
Mirror
Retaining Ring
Corrector Plate
Secondary
Mirror Mount
Handle