Author Archives: Christoph Kaltseis


About the author

Christoph Kaltseis

Christoph Kaltseis is not only an Adobe Photoshop specialist and as Nikon Professional touring for Nikon, but also an experienced astrophotographer. He is one of the founders of the Central European DeepSky Imaging Conference (www.cedic.at), which is held every two years in Linz since 2009.

In addition to his various projects, Christoph has developed an innovative image sharpening process called APF-R (Absolute Point of Focus)in recent years. The procedure is not always the same, but is adapted to the combination of lens and camera. Therefore, a flexible method was necessary to achieve the desired results.

In his career as an astrophotographer Christoph has also created several APODs (NASA Astronomy Picture of the Day), e.g. the APF-R-processed image of the M33 Galaxy or the Heart of the Orion Nebula (M42).


  • Celestron CGX mount in combination with StarAid Revolution as guiding cam

    The CGX: A Versatile Mount For Everyone! Recently I was able to work with the Celestron CGX, the Baader Apo 95/560 Travel Companion, the Nikon D810A and the StarAid Revolution as guiding system for the first time. Once again the results proved how much you can get out of a good system if you take some time to tweak the settings a little bit instead of simply working with the factory settings of the software without taking...
  • SUW 08/20: In the Heart of M42 with a C14 EdgeHD

    THE STORY: In the Heart of M42 When we were still shooting on film, it was just like today: The Orion Nebula has always been on the most-wanted-list of practically every astrophotographer. This starts with wide field shots and ends with detailed images of the surroundings of the trapezoid stars in the heart of M42. This region of M42 is much brighter than the faint surroundings, and this enormous dynamic range makes photography especially tricky....
  • 1st Light with the QHY600 EB: a first field report

    Darkness Became Light! ... A Quantum Leap in 36 x 24mm at 61.1MP? In recent years, color cameras have become increasingly popular. A reversal of the trend is not to be expected. One reason for this is the ability to capture weak structures in deep-sky objects even with moderate exposure times. Developments in CMOS sensors and recently the BSI sensor technology have played a decisive role in this. In addition, both quantum efficiency (QE) and...
  • SUW 05/20 Poster: CDK 14 and Veil Nebula - it can be so easy

    THE STORY: Veil Nebula and Planewave CDK14 – it can be so easy The "Veil Nebula" NGC 6960 is a remnant of a supernova explosion that occurred 8000 to 10,000 years ago. With a length of over one degree it is huge - and the Cygnus loop, to which the Veil Nebula belongs, is even larger at around 2°! For this picture, images from two nights were combined, whereby subframes with seeing values worse than...
  • The First Impression: RASA 8 With ATIK Horizon Colour Camera

    RASA 8 – The family is complete – First Impressions Here is a firsthand report by Christoph Kaltseis about his work with the RASA 8 and an ATIK Horizon colour camera. On the ATT fair I was asked by the company Baader if I'd like to test the newly announced RASA 8" - Rowe-Ackermann Schmidt Astrograph (#822252 € 2.195,-) . I've been using both the RASA 11" - Rowe-Ackermann Schmidt Astrograph (#822250, € 4495,-) and...
  • SUW 02/20 Poster: M31 in only 4,5 hours

      THE STORY: An M31 that fell from the sky The Andromeda galaxy is an object seen by every amateur astronomer, either with own eyes or as an image. I was particularly fascinated to image our magnificent neighboring galaxy with the RASA 8" - Rowe-Ackermann Schmidt Astrograph (#822252, € 2195,-) under a perfectly dark sky. This was one of the reasons why my way led me to La Palma for one week in October 2019, to...
  • C14 Edge-HD f/11 with 12.000mm focal length - "Mission Impossible" accomplished?

    Theory becomes Reality! Last weekend, on the 17th of February 2019, it seems I achieved my "mission impossible". With my C14 Edge HD f/11 and the Baader FFC 3x (on a 10Micron GM 2000 HPS mount) I was close to 12.000 mm (12 meters!) focal length. Myself and Baader Planetarium optimized my C14 Edge HD to dive into this performance. It looks just like a photo: Is a 4K / 30fps video live and in real...
  • APOD: M33 - Triangulum Galaxy taken with Planewave CDK14

    Impressive Image, taken with PlaneWave CDK14, chosen as APOD (27. September 2018) Convince yourself of the incredible resolution   The small, northern constellation Triangulum harbors this magnificent face-on spiral galaxy, M33. Its popular names include the Pinwheel Galaxy or just the Triangulum Galaxy. M33 is over 50,000 light-years in diameter, third largest in the Local Group of galaxies after the Andromeda Galaxy (M31), and our own Milky Way. About 3 million light-years from the Milky...
  • M45 - the Plejades taken with Baader APO and GM 1000 HPS

    The following image of the Pleiades (M45), which our customer Christoph Kaltseis has achieved with the Baader APO Travel Companion and the 10 Micron GM1000HPS on La Palma (Athos Campus), is a special treat regarding image detail and star rendition. Partically interesting is the Nikon D810A camera with a 36x24mm sensor and 4.87my pixels. Its sensational resolution will show any aberations in the optical system straight to the edges mercilessly. Most CCD cameras either have...
  • APF-R : Absolute Point of Focus

    What is APF-R The image-sharpening process APF-R was designed and implemented by Christoph Kaltseis over the last years. The basis is a simple, but important question: What does a really sharp picture look like? APF-R delineates this step in image processing in a new way. Numerous processes claim to master this topic, but in all cases, compromises have to be made. Each image is dependent on numerous factors, especially in astrophotography. Christoph Kaltseis' motivation was...

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