LRGB-Images with a 450 f/2 Schmidtcamera

The images have been obtained by stacking 2 exposures together with picture window. The first image (Luminence from LRGB) has been a 30m exposure with Technical Pan 6415 and RG610 Red-Filter, the second image (RGB) was a 6m exposure with Fuji NHGII-800 (color negative), pushed to 1600. Images are by Philipp Keller, the image processing has been made by Christian Fuchs.
Please click on the images to get a larger view.
! Please note, that the intention was not to produce a true-color picture !

NGC 6188
NGC 6188

IC 2944-48
IC 2944-48

M24

M 24

M24SW_raw.jpg (32937 Byte)
B&W-Source (Technical Pan with red-filter)

M24col_raw.jpg (32925 Byte)
Color-Source (ProGold400)

Some information about the image processing from Christian Fuchs:

A description of this technique has been found on the homepage of Jerry Lodriguess (www.astropix.com). It is a very informative site if you need further information.
- The color-picture was balanced in Photoshop (brightness and colorbalance)
- in Paint Shop Pro 6 the color-picture was seperated into CMYK and the K-channel was saved for further processing
- the program Picture Window was started and the K-channel and the B&W-picture (the Technical Pan picture) loaded
- select the function transformation composite
- use the K-channel as input image (amount 100%)
- use the B&W-picture as overlay image (amount 100%)
- combine the K and B&W-channel with the alignment function multi point
- save resulting image (this is now the new K-channel
- start Paint Shop Pro again and load the color-picture and the new K-channel
- seperate again the color-picture in the CMYK-channels
- use the function "combine channels" and replace the K-channel of the color-picture through the new K-channel that was created in Picture Window. If the channels are displayed as negatives you will have to transform the B&W-picture in a negativ first
- save result
- final image processing (the image will have to be brightened)

Here the same text in German:

- zuerst in Photoshop das Farbbild bearbeiten ( Farbbalance und Helligkeit )

- in Paint Shop Pro 6 beim Farbbild die Farbkanäle im CMYK Modus Trennen und
das K Bild zur weiteren Verarbeitung abspeichern

- in Picture Window das K Bild und das SW ( Rotfilter ) Bild öffnen

- Funktion Transformation Composite wählen

- das K Bild als Imput Image verwenden ( Amount 100% )

- das SW Bild als Overlay Image verwenden ( Amount 100% )

- mit der Alignment Funktion Multi Point kombinieren

- Ergebniss speichern ( dies wird das neue K Bild )

- in Paint Shop Pro 6 das neue K Bild und das Farbbild öffnen

- das Farbbild wieder in CMYK Modus trennen

- Funktion Kanäle kombinieren wählen, dabei das K Bild der Farbaufnahme durch das in Picture Window bearbeitete SW Bild ersetzen ( in Paint Shop Pro 6 werden die einzelnen Bilder als Negativ angezeigt, deshalb das SW Bild in ein  Negativ umwandeln )

- Ergebniss speichern

- das Bild ist nun recht dunkel, deshalb in Photoshop mit der Funktion   Tonwertkorrektur richtig einstellen

- zum Schluß noch Helligkeit, Kontrast und Farbsättigung nach bedarf steigern


- fertiges Bild speichern.