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Post by brianb on Jan 3, 2010 14:48:03 GMT
Seeing wasn't too good last night so I stuck to x2. I'm quite pleased with the result.  2010 Jan 03, 0309 UT. CPC1100, x2 barlow, Astronomik type 2c colour seperation & Planet Pro 742 IR pass filters, DMK21. What's different about this is that I ditched the red channel AVI and used the IR channel instead. Had to fiddle a bit with the colour balance but it seems to be a better job. That cloud on the sunlit limb appears to be real.... I could just about glimpse it at the eyepiece in the rare moments of steadier seeing. |
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Post by Paul Evans on Jan 4, 2010 13:25:16 GMT
Very impressive!
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Post by brianb on Jan 14, 2010 20:29:15 GMT
Cloudy weather recently - I reprocessed the AVIs which generated the above image & have what I feel is a major improvement.  Top row: LRGB composite; simulation (Starry Night Pro) Bottom row: infra red, red, green & blue images. Infra red, best 500 out of 3000, using Astronomik Planet Pro 742 filter Colours: best 500 out of 2000, using Astronomik type 2c coliur seperation filter set Composite: RGB with IR used as luminance channel |
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Post by Paul Evans on Jan 23, 2010 16:53:53 GMT
It is indeed much better Brian! Interesting to see just how little surface detail is carried in the blue channel. Is this due to the filters or is it real?
Paul.
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Post by brianb on Jan 23, 2010 18:22:14 GMT
It's a real effect, caused by scattering in the Martian atmosphere. What does show up in the blue channel - apart from the ice cap - are atmospheric features - haze or cloud - there are lots of images on "Cloudy Nights" showing persistent cloud over Olympus Mons & the other large volcanoes (on the other side of Mars to that pictured above) but there is a hint of brightening along the sunlit limb (morning haze) and a patch of thin cloud on the equator at the terminator.
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Post by Paul Evans on Jan 24, 2010 15:10:08 GMT
That's very interesting thanks Brian - as all my camera are colour I've never captured the channels separately before. I was going to have a go at Mars with my Toucam /ETX105 OTA/LXD75 combination last night but as soon as I got set up it started raining so no dice  Paul. |
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