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Monday, August 09, 2010

How to process Jupiter with GIOTTO

These are the settings I used recently to process my Jupiter photo. The software you see is http://www.giotto-software.de/ available in german language. Don't forget to make a "white balance" with MaximDL after finishing it.

RGB vs. RRGB in planet photography

If you are a planet photographer and you make video sequenses with a color webcam, I have a good tip for you. After adding the avi video stream with GIOTTO or Registax, separate the R/G/B channels with MaximDL or GIOTTO. Copy the R channel to a new file to use it as luminance. Finally load all four files in CCDSoft to make a RRGB composite. You can compare the results on the photo above.
The RRGB processing brings out invisible details of a RGB photo. My RRGB composite above is sharper than the RGB although I think the RGB has better colors than the RRGB. One problem I can mention, is that the red channel as luminance can not match the green or blue details of the planet. Normally, a "real" luminance channel should match all the colors of a RGB photo. That's not the case in RRGB. But as you know, the red channel is immune against atmospharic turbulences, this is the reason why in MY case the red channel shows more details than the green channel. The bayer mask of an OSC cam has two green pixels but only one red pixel. Hence the green channel could better serve as a luminance channel under perfect seeing conditions (in the space ;-). I think so. If a reader has a suggestion please comments this topic. Thanks.

Monday, August 02, 2010

The storms on Jupiter

Last night, the seeing was surprising good here in South Germany, so I decided to observe Jupiter with my Takahashi Mewlon 210 telescope. The views of this planet were stunning indeed, even at the high magnification of 300x using a Takahashi 7mm LE eyepiece. After this observation, I decided to attach my Imaging-Source DBK21 color webcam on the telescope and to take some photos.
Here you can see the results.
You can see even the storms on the planet. It is amazing, isn't?
Made in Stuttgart on July 31th, 2010 with a Mewlon 210 telescope at 6000mm focal length. All pictures are RRGB composites. An animation of the above photo series is available in my site at http://www.astrodigital.net/projects/projects.html / Chapter "Jupiter"