Hi all

I captured these on the 30th December 2007 and only just got around to processing them.

For something different (for Tycho and Wilhelm), I tried a HDR approach - capturing 2 avi's; one which had the highlights overexposed, and one which was slightly underexposed. I processed them both identically, and combined them using layer masks in photoshop - similar to how we do it to reveal the core of M42 with shorter exposures.

It allowed me to get the histogram just right and have a better dynamic range without blowing out the highlights. It seemed to work fairly well and is something i'll do again in future when the subject needs it.

On Wilhelm, I like the banded contrast across the crater floor, due to the rays from Tycho splashing out.

MAP processing, about 200 frames stacked on each alignment point (between 4-8 alignment points).

Thanks for looking.

Attached Images

	20071230-tycho-low.jpg (96.6 KB, 28 views)
	20071230-plato-low.jpg (95.4 KB, 25 views)
	20071230-wilhelm-low.jpg (94.0 KB, 24 views)

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Mike
. mikesalway.com.au - Astronomy and Photography by Mike Salway
. IceInSpace - The Australian Amateur Astronomy Community
. My Bio | My Jupiter 2007 Gallery | My Image Gallery

Mike,

Great shots and a great approach on the highlights. I've always disliked how the brightest sections of my lunar shots are pegged on the white end -- I'll have to give this approach a try.

--Andy

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Observatorio de la Ballona

Thanks Andy. It wouldn't work for every target all the time, but I think it could prove quite useful for craters/regions where the illumination gives a very bright side and a very dark side.

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Mike
. mikesalway.com.au - Astronomy and Photography by Mike Salway
. IceInSpace - The Australian Amateur Astronomy Community
. My Bio | My Jupiter 2007 Gallery | My Image Gallery

Great shots, I wonder if this technique would be useful for high contrast limb shots?

Kind regards
Mattt

Hi Mike you have three beautiful images of these craters, I like the method you applied to them very interesting info, Very sharp and detailed and outstanding greyshade color. Thanks and Clear Skies