From: Alan Friedman <alan@greatarrow.com>

Date: March 21, 2007 11:42:30 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Saturn March 20!


Hi Jim -


Maybe you could post your original RG&B files for a little troubleshooting help. Remember that there is no need to process these much at all (other than for brightness levels). Don't get carried away with unsharp mask - the detail is carried by the luminance layer (assuming you are doing an LRGB composite.) If you take your L-RGB composite and run a BIG Gaussian Blur on the RGB layer, you can see how little effect a soft color layer has on the final image.


I was out much of last night (12 gigabytes worth). The seeing in Buffalo was excellent - easily the best in two years and perhaps even a little better. I think I will labor over the data a bit since it's so nice! Will keep you posted.


best -

Alan



On Mar 21, 2007, at 11:04 AM, jimchung2338 wrote:


Thanks for everyone's helpful responses from yesterday! Last night the greater Toronto area 

experienced good skies and I think it helped my imaging of Saturn:


SaturnLRGBMar20.jpg in the Planetary folder


Alan: Hope you were able to image last night, Buffalo probably had similarly good skies


Tim: I am luckily using dichroic RGB filters that came with this budget priced Apogee filter 

wheel - don't know if it's worthwhile spending more on name brand filters?


Phil: I generally use an IR blocking filter upstream of the flip mirror to avoid and color

imbalance. I've also been balancing my colors by making the rings as white as possible, is 

there a PS tool that allows you to designate an area a certain color and then auto adjust the 

other areas relative to that one?


Jim


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