This article is about Astrophotography in Oberstdorf. Last year I put all my equipment into the car and drove to Lake Garda. Unfortunately, in contrast to the forecast I had lots of clouds and no chance to take a good astro-picture. Last weekend I decided to give it another try and took all my equipment to Oberstdorf – a small village at the foot of the German Alps. Beside hiking I think this place is well suited for astrophotography.
I found a good place not far from the center of Oberstdorf, with free view to Polaris and almost no traffic:
GPS coordinates: 47°24’17.5″N 10°17’28.9″E
(Oh, and btw. a good Italian restaurant is also not too far: Ai Quattro Canti…)
Compared to Böblingen the light pollution in Oberstdorf is much less critical. I was even able to see the Milky Way from my observation point. The picture on the left I took this evening with my Fujifilm X-T1 camera (f/2.8, 15s, ISO2000). The image was saved as RAW and post-processed with rawtherapee. For this image the dark-frame subtraction was enabled. Unfortunately there is still some noise in the image…. :/
Anyhow, due to the good conditions I decided to give the Witch’s broom nebula another try.Continue reading →
vdB 126 is a reflection nebula in constellation Vulpecula. I like the many stars in this region! In this clear night I was able to get 8 good IR frames before the moon rose. For stacking I used DeepSkyStacker 3.3.2 with Kappa-Sigma Clipping. The picture is also available in full resolution here. Finally, I decided to put it into my My Top Astro-Pics gallery.
|Location||Böblingen / Germany|
|Object||vdB126 (Reflection nebula)|
|Guiding||yes, QHY5-II Mono via OAG|
|Luminance||8x, 600s, bin: 1x1|
|Red||7x, 150s, bin: 2x2|
|Green||7x, 150s, bin: 2x2|
|Blue||7x, 150s, bin: 2x2|
Last updated: May 30, 2019 at 13:38 pm
For those who are interested in technical details: Most of the time-lapse recordings have been taken with the Fujifilm X-T1. My self-made 12V power adaptor was sometimes quite helpful. On the camera everything was set to manual (despite a few recordings with aperture priority).
The whole time-lapse post-processing I did on Linux (parts of this tutorial I found very useful). First, I developed the RAW images from the camera using the open source tool rawtherapee. In order to reduce flickering I used this deflickering script developed by Vangelis Tasoulas to reduce the flickering. In case the recorded time-lapse was too short, I used the free open source tool slowmoVideo (developed by Simon A. Eugster) to interpolate additional frames. Finally, I used kdenlive for creating and cutting the videos. Previously I used openshot but at this point in time kdenlive seems to be more stable.
One remark regarding the Fujifilm X-T1 and time-lapse recording: Sometimes I had problems with the X-T1 when the time between the frames was too short (< 3s). It introduced random delays of up to several seconds so that the images taken were not recorded at the same interval. This resulted in videos which did not play smooth. Increasing the time between the frames resolved this problem. Probably the camera did not finish writing the previous image to the SD card. After some research I found that this is probably a fragmentation problem of the SD card. Using high quality SD cards and formatting the card prior to its usage should help in the future.
Last updated: July 31, 2016 at 15:32 pm