The processing of the underlaying date never lead to an acceptable result of my Purgathofer-Weinberg 1 shot. With new processing tools I could produce a good result, finally.
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Coma Corrector Update III
Coma Corrector Update I+II
Since I’m now experimenting with the Starizona Nexus as a possible replacement of my 0.73x corrector, I revised the corrector pages corresponding to my 10″ astrograph and added much information to „Optisches Konzept“ and „Optik in der Praxis“. I did this basically for my own documentation, hence it is in german language.
Added a second test under the night sky with my DIY QHY-Adapter. It seems to be a usable set-up.
Where Serpens, Sagittarius and Scutum meet
The area where Serpens, Scutum and Sagittarius join is close to the center of our milky way and many nebulas can be found there. Among others, the famous Eagle Nebula (M16) and Omega Nebula (M17) are located in this region. Added a page showing photos taken over the years.
Witch Head Nebula IC 2118
Taking the first photo (no in the archive) of it at Athos at LaPalma in 2018 I had issues regarding framing and reflexes.
During my 2025 vacation at Tenerife I tried it a second time. Shot an update at Teide approx. 2040m asl. Find it in the wide fields.
Some Galaxies of Coma Cluster
Added a photo taken this year during April to the gallery. The data hided at my hard disk suring summer, but no they been process satisfactorily.
Quest for the Grail
Since years I’m trying to get a picture of the supernova remanent SNR G65.3+5.7. One brighter part of it is Sh2-91. Here I collected my notes and the latest result of summer 2025.
M 81 Group with Integrated Flux Nebula
I added an 28 hour exposure of the M 81 Group showing the galaxies and the so-called Integrated Flux Nebula. See my picture page for more information and a comparison to a photo of 2017.
Update for Star Adventurer
I updated the german description of my Skywatcher Star Adventurer mod with 2 axis guiding (see section Star Adventurer Mk II). It now come swith a lighter stepper, a new power supply and some 3D printed parts.
UMI 17 Lite
A new article describes a mobile set-up with an UMI 17 Lite.