From: Mark Gaffney <markgaffney@mac.com>
Date: March 7, 2009 9:35:09 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] More New Lunar Images..
Hi Milton you like that "DomeZilla" region don`t you!! I guess you mean the RGB saturation box? The images were that colour when taken-perhaps not light enough, although I thought I was already being gentle with the colour! If what you`re saying about your originals is right they`re more grey than brown to my eye- must be a very light on approach! You`re right I`ve got the "Sharpen the frames used for pixel alignment" box & the "Sharpen frames by (High) amount before stacking them" selected. I missed that bit about it needing to be very light. Here`s one of the movie logs (there were about 18 in the mosaic!)
I hope it`s OK to attach this-saves me changing to your personal email address? I just about have the Peltier cooler for the Flea 2 ready- my brother is soldering the 3 wires on each side together right now as well as the black to the white on the camera`s rat-tail. This week I should get my Celestron Radial Guider with a bit of luck! How does one go about working out suitable exposures for these DSOs? It must be different for each object? Rod Mollise is talking about a program called "Sky Tools" which I understand has a ready reckoner for this- it`s pretty expensive though! Thanks, Mark.
On 08/03/2009, at 2:25 PM, Milton Aupperle wrote:
Hi Mark;
Thanks. Sinus Iridum shows some really interesting features. The
north (top) edge has an interesting radial fault (probably Imbrium
related) that I haven't seen mentioned before. I also shot a long
strip last night along the "DomeZilla" area west / left of Copernicus
that I hope to process tomorrow.
As to your question on the my color exaggerated Luma images.
In the images
http://www.outcastsoft.com/AstroImages/Luna_Enchanced_20050419_MJA.jpg
and
http://www.outcastsoft.com/AstroImages/Luna_Enchanced_20050216_MJA.jpg
The left image is the the original source movie, which is basically a
grayish brown color. The right image is what I get after I increase
the saturation which enhances the subtle colors. Those were done in
the Image Processing window of Astro IIDC by setting the Saturation
to between 3.0 to 5.0 range and then adjusting the Red, Green and
Blue Gain values in very small (0.01) increments. A tiny amount of
change can have really drastic changes in color changes when the
saturation is that high.
The Lunar images that you posted look very red-orange. Is that how
they are originally or is that done in processing? If that is how
they were shot, then it will be very tough to generate the
exaggerated color images like I have, because the colors are off to
start with. So basically they have to be color balanced properly when
you shoot them or it likely is not going to work.
As to the bluish craters you mentioned, without seeing your stacking
log text file to see what options you used, my guess is your cranking
the "Sharpen frames by xxxx amount before stacking them." (see page
32 and 33 of the manual) pop up menu to some high amount? Don't do
that or it will produce artifacts. As it says in the manual for using
this option "For high contrast objects (i.e. lunar terminator, solar
limbs etc.), you should not be using more that "Very Light" sharpening."
Hope that helps..
Milton Aupperle
On 7-Mar-09, at 6:25 PM, Mark Gaffney wrote:
They`re great Milton, I especially like "Sinus Iridium"! Mark.
On 08/03/2009, at 11:55 AM, Milton Aupperle wrote:
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