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.
The frames were then post-processed with rawtherapee and averaged using the ImageMagick “convert” tool. In addition 4 frames of the foreground (the house) were taken and also averaged (of course with disabled EQ6 mount). Finally the two pictures were overlaid and merged with the help of a mask using gimp.
To me it is amazing to see the Andromeda Galaxy (M31), the California Nebula (NGC1499), the Orion Nebula (M42), the Pleiades (M45) and the Horsehead Nebula (B33) clearly on this photo. This overview picture gives a good idea of the brightness, size and exact location of the objects compared to each other.
A full resolution image of the result can be found here. Another image without object descriptions can be found here. I am curious to repeat this procedure in summer when the bright part of the Milky Way will be visible again 🙂
Last updated: May 18, 2022 at 8:37 am
It’s stargazing time on La Palma again – this time from Casa Las Flores. The little house is located in Aguatavar – close to Tijarafe on a height of about 580m. You have a power supply outside the building, free view to Polaris from both terraces and in July the bright part of the Milky Way is perfectly visible between 22:00 and 4:00 local time. Furthermore you have a coffee maker, a table, chairs, a fast WLAN internet connection and a barbecue. What else do you need? 😀
The image is a single frame recorded with an Canon EOS6D in combination with a Samyang 2.8/14mm lens (15 sec. exposure time, ISO4000) . The post processing has been done with rawtherapee.
Tonight I only test my equipment – for tomorrow I plan to record the bright nebula M8 in the milkyway. So stay tuned for the result!
Last updated: June 16, 2022 at 12:10 pm
This image of the Milky Way has been recorded in a clear, cold night not so far away from Roque de Los Muchachos on La Palma. 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 (3.1MB).
Last updated: June 9, 2022 at 22:10 pm
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?
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