How to Calculate the Correct ADU Target for Flats

A Step-by-Step Guide – Using the ToupTek SkyEye 62AM and SkyEye 24AC as Examples

WarpAstron WD-20P 1/3 – The purchase decision

Last week, I finally hit the “buy” button. After extensive research, I chose the Harmonic Drive mount WD-20P from WarpAstron.

StellaVita 1/2 – A Step Toward Independence

It was time for a permanent adaptation of an astrocomputer to my Vixen VC200L.
I chose the ToupTek StellaVita.

More Contrast Under Suburban Skies – My Experience with the Baader UHC-L Booster Filter

More contrast under suburban skies — my real-world experience with the Baader UHC-L Booster Filter (50.4 mm).
Three projects, challenging conditions, and an honest technical conclusion from my backyard in Koblenz.

RGB with OSC or Mono Camera?

I’m increasingly considering capturing RGB data with a one-shot color camera instead of continuing with mono and separate filters. While mono remains efficient, the RGB workflow is time-consuming, and early tests with two cameras have shown that it can significantly reduce routine overhead. As a result, my focus has shifted less toward pure image quality and more toward handling and workflow efficiency.

Surveys in Stellarium

Perfect detailed planning of the deep-sky object and the framing using Stellarium HiPS full-sky surveys!

The Moon, Mar 05 ’25

A spontaneous Moon photo with 1800mm focal length after collimating my VC200L and making use of several clear nights.

Old flats are like old toothbrushes

Old flats: Poor correction, bad results.
Fresh flats: Proper calibration, much better image quality.

Processing Improvements in my PixInsight Workflow

My PixInsight processing comparison between 2021, 2024 and 2025 and some Tools and Methods I use.

Gerd Neumann Camera Tilting Unit

A tilt unit corrects sensor tilt and ensures uniform sharpness. The CTU from Gerd Neumann provides precise adjustment while also optimizing the back focus.

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