Help with stacking

Here Jack, I did the normal averaging to reduce noise.
Simply a test and I had the TV turned one so the white balance is different with both and the tripod wasn't 100% sturdy either but you clearly see a difference though.

Averaged



original



You can click on them for full size
Suggestion would be to open them in different tabs and simply switch between the two to see the difference, it's quite large.

Technical data
K10D + DFA 100mm
20 seconds
f/8
iso 800
Averaged shot contains of 7 shots done with the help of this site.
http://www.galacticfool.com/align-stack-images-photoshop/

Noise is very much reduced in the first image, but what on earth is it?

That's a surprise Peter, will show it to you over some minutes since there is a whole script in photoshop that works better then what I did there manually and I will upload the results but first I need to eat since dinner is ready.

Here is a site that explains where it is in Photoshop but there are far more options which I still need to find out what they do.
http://photoshopnews.com/2007/03/27/image-stacks-in-photoshop-cs3-extended/

Done with the Photoshop script now, it automaticly even agilne them so all very easy to do and the result is even better.

These are no 1:1 pixel crops, no resizing done by PUF

Averaged
[IMG]http://i282.photobucket.com/albums/kk244/Anvh/Average2-oon.jpg[/IMG]

Original
[IMG]http://i282.photobucket.com/albums/kk244/Anvh/Average2-off.jpg[/IMG]

Who said ISO800 was noisy with the K10D?

Here are the full sized files, original has the metadata.
Original link
Averaged link

edit: here is what you can do with stacking in photoshop link

Summation stacking modus in photoshop was the one I was looking for it does this.
The sum channel values for all non-transparent pixels

The only problem is that the white balance of my photos aren't so good and different between the photos so it didn't went so well but it did what I was hoping it should do.

So instead of making one shot of 80 second iso100 You can do 8 shots of 2.5 seconds and iso400.
Since the noise average out over the 8 photos it is quite clean.