Celestron Compustar Manuál s instrukcemi stáhnout pdf (Strana 46)

Figure 23. The author’s “first light” image of M51, the Whirlpool galaxy and NGC 5195,

obtained with the SBIG STL 11000M and the Compustar C14 and a 0.75x focal reducer

(f/8). Admittedly, the galaxies are not centered because it was decided to use the brightest

available guide star in the vicinity for this first attempt at autoguiding. Self-guiding has

since been successful on much fainter stars, permitting better framing of subjects (see

Figure 24). The image is still interesting showing the wide field of the STL 1100M, with

colorful field stars, and there are at least 40 faint background galaxies visible. The latter

include the small blue face-on barred spiral IC 4278 above the bridge and the edge-on

spiral IC 4277 above the large, diffuse "E" formed by the tidal spray of stars from NGC

5195. The image was taken from Portland, OR, on 05-08-2011 beginning at 23:16 UT

through Baader Planetarium LRGB filters LRGB=184:70:70:70 = 7hrs:04min total

exposure.

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Celestron Compustar Manuál s instrukcemi Strana 46