Tonight I took a photo of the Milky Way, Saturn and Jupiter from the northern edge of Lake Constance towards Switzerland and the Alps. The image is a single shot with an EOS6D plus a 14mm Samyang lens (exposure time 15s, ISO 6400). I post processed the frame with Raw Therapee and with GIMP.
This image of the Milky Way has been recorded in a clear, cold night not so far away from Roque de Los Muchachos. It has been recorded with an EOS6D in combination with a Rokinon 14mm/f2.8 fast lens. The exposure time was 20s with ISO6400. A darkframe has been subtracted later on. The RAW file has been developed using rawtherapee
. For correction of vignetting and perspective a lens correction profile from this website
has been used (btw. thanks for providing this profile!).
The image is also available in full resolution
In this post I want to show a way of Milkyway image processing which does not require any commercial software product. The idea is to use rawtherapee, DeepSkyStacker and GIMP to develop, align and combine the frames to one final image.
Camera: Fujifilm X-T1, Exposure time: 25sec. per frame, ISO: 1250, Aperture: f/2.8, focal length: 18mm
Quite often it is advantageous to use a high ISO value to get as much details as possible in the available exposure time (before the earth rotation becomes visible). On the other hand one probably does not want too much noise in the image. Therefore, the idea is to take multiple frames at a high ISO value and stack them later to reduce the noise. There is just one problem: The earth rotates and from frame to frame the stars are in different positions. Therefore an alignment of the frames before averaging is required. But then we get another problem: The foreground of each frame moves and so the resulting foreground gets fuzzy in the end. What to do? Continue reading →