Connecting The Older Model Cfw-6 Filter Wheel To The Camera - Santa Barbara Instrument Group CCD Camera Operating Manual

Field of
View
Camera (arcmins)
Tracking 4.2x4.2
CCD
ST-5C 5.4x4.1
ST-237 8.0x6.0
STV 8.0x5.0
ST-6 14.6x11.1
ST-7E 11.9x7.9
ST-8E 23.8x15.8
ST-9E 17.6x17.6
ST-10E 25.1x16.9
ST-1001E 41.6x41.6
Object
Moon
Jupiter
M51-Whirlpool
Galaxy
M27-Dumbell
Nebula
M57-Ring Nebula
From these numbers you can deduce that the popular C8, an 8" f/10 telescope will nicely frame
many popular objects with the ST-7E whereas a much shorter system (f/3, perhaps achieved
with a focal reducer) will frame the same objects for the tracking CCD. Another point to bear
in mind is that, except for planetary images, you'll rarely take images where the pixel size in
seconds of arc is down near the seeing limit. Most objects are relatively large, where the field
of view is more important than whether the individual pixels are less than half the seeing.

4.6 Connecting the older model CFW-6 filter wheel to the Camera

The SBIG CFW-6 filter wheel can be connected to the camera using the relay port
adapter provided with the camera. The adapter plugs into the 9 Pin connector on the
6
f/6.3 with the Meade star digonal focal reducer.
Section 4 - Camera Hardware
C8, 8" f/10
Pixel Field of
Size View
(arcsecs) (arcmins)
1.3x1.5 11.7x11.7
1.0x1.0 14.4x10.8
0.75x0.75 21.6x16.2
1.5x1.5 21.6x13.5
2.3x2.7 38.9x29.5
0.9x0.9 31.2x20.8
0.9x0.9 62.4x41.6
2.0x2.0 46.2x46.2
0.7x0.7 67.0x45.2
2.4x2.4 111x111
Table 4.4 - Field of View
Size
0.5°
40 arcseconds
8 x 5
arcminutes
8.5 x 5.5
arcminutes
1.3 x 1
arcminutes
Table 4.5 - Focal Length Required
Page 30
LX200, 10" f/3 6
Pixel Field of
Size View
(arcsecs) (arcmins)
3.7x4.3 2.3x2.3
2.7x2.7 2.8x2.1
2.0x2.0 4.0x3.0
4.0x4.0 4.0x2.5
6.2x7.3 7.6x5.7
2.4x2.4 6.1x4.1
2.4x2.4 12.2x8.2
5.3x5.3 9.1x9.1
1.8x1.8 13.0x8.8
6.5x6.5 21.6x21.6
Focal Length to fill
Tracking CCD
275mm =
11 inches
13000mm =
510 inches
1040mm =
41 inches
"
6400mm =
250 inches
14" f/11
Pixel
Size
(arcsecs)
0.7x0.8
0.5x0.5
0.38x0.38
0.75x0.75
1.2x1.4
0.5x0.5
0.5x0.5
1.1x1.1
0.36x0.36
1.27x1.27
Focal Length to fill
ST-7E
760mm =
30 inches
34000mm =
1350 inches
3700mm =
145 inches
"
23000mm =
900 inches