Celestron 11007 Manual de Instruções descarregar pdf (Página 31)

>> www.celestron.com

The key factors for good CCD imaging are; exposure time, eld-of-

view, image size and pixel resolution. As the f-number goes down (or

gets faster), the exposure times needed decreases, the eld-of-view-

increases, but the image scale of the object gets smaller. What is the

dierence between f/2 and f/10? F/2 has 1/5 the focal length of f/10.

That makes the exposure time needed about 25 times shorter than at

f/10, the eld of view 5 times larger and the object size 1/5 compared to

that of f/10 (see Figure 8-8).



Telescope sTandard f/10 f/2

odel configuraTion configur aTion

8” 80” (2032 mm) 16” (406.4 mm)

9.25” 93” (2350 mm) 18.5” (470 mm)

11” 110” (2800 mm) 23.1” (587 mm)

Auto Guiding

The CPC has a designated auto guiding port for use with a CCD

autoguider. Figure 8-9 may be useful when connecting the CCD camera

cable to the CPC and calibrating the autoguider. Note that the four

outputs are active-low with internal pull-ups and are capable of sinking

25 mA DC.

1 = No Connect

2 = Ground

3 = +RA (Right)

4 = +DEC (Up)

5 = -DEC (Down)

6 = -RA (Left)

1 2 3 4 5 6





1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 49 50

Sem comentários

Celestron 11007 Manual de Instruções Página 31