From: "Alan Friedman" <alan@greatarrow.com>

Date: November 26, 2005 8:56:05 PM MST

To: <Astro_IIDC@yahoogroups.com>

Subject: Re: [Astro_IIDC] What a difference a little work makes

Reply-To: <alan@greatarrow.com>

Steve-

Great work. The second image is a dramatic improvement. Try constraining your

sharpening on lunar images to a small pixel diameter. I think you will find the most

natural results can be achieved with this setting.

Looking forward to seeing images from your new camera.

Alan

---------- Original Message ----------------------------------

From: "Steve Bryson" <stevebeam@yahoo.com>

Reply-To: Astro_IIDC@yahoogroups.com

Date: Sat, 26 Nov 2005 07:14:09 -0000

<tt>

Hi - Following Alan's example, I've reworked my image of Hadley Rille. I used

astrostack

to derotate and save over 5000 frames, hand picked the best ones (ended up

with 233),

and used Keith's Image Stacker to produce 11 different stacks, each aligned on a

different

feature and identically pyramid sharpened. All assembled and further enhanced

in

Photoshop. The improvement is considerabe: The before image (based on the

best 40 of

900 images) is at

<a href="http://homepage.mac.com/stevepur/astrophotography/images/firei/

hadley_apollo_15.jpg">http://homepage.mac.com/stevepur/astrophotography/

images/firei/hadley_apollo_15.jpg</a>

while the after image is

<a href="http://homepage.mac.com/stevepur/astrophotography/images/

firei/">http://homepage.mac.com/stevepur/astrophotography/images/firei/</

a>

hadley_composite.jpg

Stacking so many frames allowed me to be very agressive with the pyramid

sharpening.

No explicit noise reduction was needed. Some camera artefacts are visible in the

lower

half of the image. I do have a voice in my head suggesting I oversharpened in

the last

photoshop step. Anyone out there feel that way?

This wasn't as hard as it sounds, only about two hours of actual work. The

aligning and

derotating in astrostack took a very long time but I did not be there while it did

it.

I got my DMK camera today, but it's too windy tonight. Maybe I'll try it out on

Mars

tomorrow. Can't wait to see what I can do with the moon with it!

Happy Thanksgiving weekend!

Steve

<a href="http://homepage.mac.com/stevepur/astrophotography">http://

homepage.mac.com/stevepur/astrophotography</a>

</tt>

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