74tuc
10-02-2007, 01:27 PM
Hi ,
Here is a pic taken while testing the autoguider after mount polar alignment.
The pic is the result of exposure blending 11 images with exposures of 1sec. to 1024 sec. (total time = 2047 sec.) In a sequence of 1,2,4,8 .... sec. The sequence gives a 14 Fstop range. ISO = 800. It should be possible to lower the ISO setting to get a better SNR. These images were combined to make a single HDR image format (eg. Radiance RGBE) then tone compressed to make the colours fit the monitor.
Camera is a standard EOS350D
Dark frame processing was done in the camera and there is no stacking.
Notice that Zet-Ori is nicely resolved and the companion is clearly visible.
Some structure in the Horsehead is being revealed
The Flame is showing up quite well.
Jerry:)
addition:
Note the Bok Globules are visible in the reflection nehula below zet-ori - see larger pic.
Here is a pic taken while testing the autoguider after mount polar alignment.
The pic is the result of exposure blending 11 images with exposures of 1sec. to 1024 sec. (total time = 2047 sec.) In a sequence of 1,2,4,8 .... sec. The sequence gives a 14 Fstop range. ISO = 800. It should be possible to lower the ISO setting to get a better SNR. These images were combined to make a single HDR image format (eg. Radiance RGBE) then tone compressed to make the colours fit the monitor.
Camera is a standard EOS350D
Dark frame processing was done in the camera and there is no stacking.
Notice that Zet-Ori is nicely resolved and the companion is clearly visible.
Some structure in the Horsehead is being revealed
The Flame is showing up quite well.
Jerry:)
addition:
Note the Bok Globules are visible in the reflection nehula below zet-ori - see larger pic.