| Object : | Constellation Cygnus and the Milky Way
|
| Date : | 2007-08-25 |
| Time (UT) : | 22:16 to 22:45 |
| Mount : | EQ4 |
| Lens/telescope : |
Pentacon 50 mm f/1.8 (set to f/4.0) |
| Corrector/Barlow : | none |
| Field (FOV) : | 24x17 degree, before cropping |
| Filter : | none |
| camera : | Canon 350D |
| Film/CCD : | Raw iso800 |
| Exp. time : |
5x15, 5x60, 5x240 seconds.
Controlled from "Shutter Sequencer" as an alternative I could have taken 105x15 seconds exposures,
but it had given more noise and less dynamic. |
| Image process tool : | IRIS (advanced free tool) |
| Processing : | bias, dark and flat corrected, HDR (High Dynamic Range), log, blur (for the color) |
| Weather : | Just a few clouds |
| Site : | Sweden Midsommarkransen 4:th floor. Bortle class 9 |
| Comment : |
It is fantastic what a digital camera and a computer can do!
Sky with light pollutions and it wasn't even free from clouds, the lens is over thirty years old.
It's processed in IRIS and the HDR function is used to stack them together to keep the dynamics.
The image field is about 25 by 16 degrees. |
English
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