From: Milton Aupperle <milton@outcastsoft.com>

Date: January 20, 2010 10:37:19 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: New AstroIIDC user

Mark;

They aren't using FMT7 with ROI, they are just using 800x600 size. And the camera hardware is doing the binning, not Astro IIDC in Software.

Also, according to the capture log, Live Flats and Darks were not used for your image.

It's probably flat with little sharp detail because it could be

1) Poor focus

2) Poorly Collimated Telescope

3) Turbulence

Any of those will soften the image.

Here is how you tell if your collimated properly or not with an SCT:

http://sctscopes.net/SCT_Tips/Maintenance/Collimation/collimation.html

and this article shows the difference between poor and perfect collimation:

http://legault.perso.sfr.fr/collim.html

HTH..

Milton Aupperle

On 20-Jan-10, at 9:55 PM, Mark Gaffney wrote:

Hi Alan,

I did find my 800 x 600 Scorpion ROI images & capture details. This was earlier on with a full moon-actually the set of images, one of which which you altered for me in Photoshop. I don`t know if it`ll tell you anything (I have binning turned off in this one.. dark frame subtraction & flat frame correction are turned on which may be a clue to why the images were washed out?