From: "Tim" <tjp314@pacbell.net>

Date: February 11, 2007 10:40:38 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: My Saturn at Opposition

Jim:

I don't know if you're already doing this or not, but make sure that

the histogram for each filter and luminance is about in the middle of

the plot.  If it's too far to the right, you'll saturate, and when you

go to make RGB, you'll get only white.

Don't know if that's what's wrong here, just what I experienced early

on with registax.

-Tim.

--- In Astro_IIDC@yahoogroups.com, "Alan Friedman" <alan@...> wrote:

Hi Jim -

I'm amazed that you have been able to image at all from Toronto -

everytime I see 

a clearing and think of setting up to image it has turned to snow by

the time I get 

my coat on. Your image shows the ring brightening at opposition

quite nicely.

Not sure what is going on with your color images. The seeing should

not be an 

issue. You are doing the right thing to increase the shutter - I

would work on your 

capture settings until you see a smooth full color image on the

screen without 

need for a high gain setting. Don't worry if it's soft - even if the

cassini division is 

not visible at all. Just try to record accurate color. You can also

reduce the focal 

length to increase image brightness and resize the RGB component

later in 

Photoshop to match your luminance data. The LRGB process is quite

forgiving 

here. Remember - you don't need to process the RGB image much - it

is not 

providing the detail. If you want to test this, go to your LRGB

composite and 

gaussian blur the heck out of the color layer - see how far you can

go before it 

makes a difference in the composite image.

I used the Unibrain color industrial camera for a bit (not one of

my wiser 

purchases) - it is quite noisy, but should be able to record an

adequate color 

image if you give it enough light.

Alan

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

From: "jimchung2338" <jim_chung@...>

Reply-To: Astro_IIDC@yahoogroups.com

Date:  Sun, 11 Feb 2007 17:56:40 -0000

Well, some success at getting a color version of Saturn but I can't

seem to get the 

multitude 

of colors that others are.  I;m not sure if it's just a matter of

seeing conditions 

which have 

been generally poor all winter here in Toronto.  Certainly the mono

Flea is a great 

performing 

firewire camera.

http://tech.groups.yahoo.com/group/Astro_IIDC/files/Planetary/

saturnlrgbopposition2007.jpg

Jim