Author Archives: Dipl.-Ing. Wolfgang Paech

Wolfgang Paech

About the author

Wolfgang Paech has been practicing astronomy for more than 50 years. In addition to his many experiences with observatory domes of all kinds, his core areas are the Sun and the Moon. On the german Website www.chamaeleon-observatory-onjala.de you will find a complete moon atlas, recorded with his standard technique. But even in terms of Deep-Sky and Planetary imaging, as a veteran astrophotographer for many years, nobody can fool him.

The 50+ years of amateur astronomy with many other areas, such as the restoration of historical amateur telescopes, polar light trips and much more are prepared on his private german website at www.astrotech-hannover.de.


  • Experiences with observatory domes from Baader Planetarium and other brands

    For many years now Baader Planetarium has been asking me from time to time to put on paper my experiences with observatory domes which I had to deal with during my life as an active observer and user of observatories. I finally wanted to fulfill this wish and have summarized my experiences here ... I'd like to say a few words about my background: My amateur astronomical and technical experience with classic observatory domes began...
  • The Encke Gap in Saturn’s ring system - imaged with only 17" aperture

    On 28 July 2018 around 22:00 UTC we obtained the best image of the planet Saturn so far. It was taken through the 17" Planewave Astrograph of the Rooisand Observatory in Namibia. The imaging camera was a ZWO ASI 290M with 2.9 µm pixel size. The primary focal length of the telescope was extended by a factor of 1.7 with a Baader Q-Turret Barlow lens element, the equivalent focal length was about 5 meters. A...
  • Cleaning a CDK17 mirror with Optical Wonder Fluid

    In our Observatory installations, we have contact to customers for many years. This is why we get old telescopes for cleaning from time to time. This particular mirror is from a CDK 17" wich was used in a heavily poluted and salty area. The picture show´s that the mirror lost most of it´s reflectivity. The fun fact about this is that after the cleaning our customer wondered why all his images where saturated. The reason...
  • Hints + tricks for high-resolution lunar and planetary photography with Baader Planetarium accessories

    Hints + tricks for high-resolution lunar and planetary photography with "lucky imaging technique" and a video camera - a short workflow for Schmidt Cassegrain telescopes and Baader Planetarium accessories Pictures often say more than a thousand words ... ... again and again I am asked how I make my highresolution lunar and planetary shots. Therefore, here is a brief description of the equipment and following a few hints + tricks to the "workflow" for shooting...
  • Detailed Customer Review on CDK 17" PlaneWave Astrograph

    Dear Mr. Baader, I am happy to comply with your request and share with you my criteria that led to the purchase of the 17 inch telescope from  Planewave, and following my experience with this telescope. Since this was a rather complex topic, please forgive the long text and its extent , which certainly clearly exceeds a "normal" customer judgment. Download: detailed review on CDK 17" PlaneWave Astrograph (pdf-file) Decision criterions for the choice of...
  • APOD: Trifid nebula taken with PlaneWave CDK 17 on Rooisand Observatory

    Impressive image, taken with PlaneWave CDK17, chosen as APOD (2017 October 20) Convince yourself of the high image quality of the combination CDK 17 and TV Reducer  In spring of 2013, the turnkey "Rooisand Observatory" in Namibia, a 3.2 meter Dome, received latest equipment and technology: A new telescope combination consisting of an Astro-Physics  GTO 1600 mount equipped with a Planewave CDK 17", a Zeiss APQ 130 / 1000m and a TEC APO 110 FL together with...
  • An experience report on the new Baader Telecentric System TZ-3 and the Research Grade (RG) Telecom­pressor (TC) 0.4

    An experience and observation report on the new Baader Telecentric System TZ-3 and the Research Grade (RG) Telecom­pressor (TC) 0.4 for solar observation in the H-alpha light with SolarSpectrum filters download the complete review (pdf) Introduction Successful H-alpha-observations of the sun with narrow-band line filters from the manufacturers   “SolarSpectrum” and / or "DayStar" require an almost parallel beam of light with a focal ratio of approx. f/30 directly in front of the filter, otherwise the...
  • Baader Optical Wonder – a real optical wonder

    Shooting the Moon – in bright daylight with a Celestron SkyRis 445 M through a C14 SCT and a Baader IR Pass-filter Dear Baader Team, When I returned to Namibia this spring, I found my favourite planetary Celestron 14 SCT-OTA in a catastrophic condition. The Schmidt-corrector-plate was looking just plain filthy since someone had omitted to properly close the dust cap during all the rainy season. The telescope is located at the Onjala Lodge. The Lodge is...
  • Observation: Minor planet Clausbaader (5658)

    From Dipl.-Ing. Wolfgang Paech – Onjala- and Chamäleon Observatory, Namibia For this year's longer stay in Namibia we planned to photograph the minor planet (5658) Clausbaader. It had a high altitude in the evening sky, close to Saturn. The series is intended as a small tribute to Mr. Claus Baader, the founder of Baader Planetarium in Mammendorf, who was one of the leading personalities in the field of amateur astronomy and public education in the...

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