Celestron 91525, 11055, 11065 instruction manual Imaging at f/22, Planetary or Lunar

Imaging at f/22	Planetary or Lunar--
	f/20 is a great way to image the planets and features on the moon. With the
	PixCel CCD camera and optional Color Filter Wheel, it is easy to take tri-color
	images of planets also. When imaging the planets, very short exposures are
	needed. Many cameras have trouble taking images under .1 seconds. The
	PixCel camera can image at .01 seconds exposures due to the design of the
	CCD array. The exposure lengths range from .03 to .1 seconds on planetary
	images. Focus is critical as is good atmospheric conditions. Generally you
	will take one image after another until one looks good (see AutoGrab feature in
	the PixCel Operating Manual). This is due to the atmospheric “seeing” condi-
	tions. For every 10 exposures you might save 1. To image at f/22 you need to

purchase a 2x Barlow and a T-adapter or Radial Guider.

	20
	10
23
14
16		24
15
13
19	22
	21
12		20
		10
18
1
11	19	9
	17

2

3

4

5

86

3

7Figure 7-6 -- This diagram shows the many accessories that can be used with the Fastar compatible

10	9	CM-14 telescope in its various optical configurations.
	1	Optical Tube Assembly	13	Radial Guider
	2	Secondary Mirror	14	Microguide Eyepiece
	3	Secondary Mirror Retaining Ring	15	Illuminator (Microguide Eyepiece only)
	4	Fastar Lens Spacer	16	Pulstar Illuminator
	5	Fastar Spacer Retaining Ring	17	Visual Back 1 ¼”
	6	Fastar Lens Assembly	18	Star Diagonal
	7	Tricolor Spacer Ring	19	2X Barlow Lens
	8	Fastar 14 T-Adapter	20	Cross Hair Eyepiece
	9	IR Cutoff Filter	21	26mm Plossl Eyepiece
	10	PixCel CCD Camera	22	T-Ring
	11	Reducer/Corrector f/6.3	23	T - 1 1/ " Adapter
	12	T-Adapter	24	4
				35mm SLR Camera

62 • Celestial Photography