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71841Re: [ccd-newastro] q. about images without flats

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  • yahoo@wodaski.com
    Oct 1, 2012
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      It would be helpful to see the image. Can you upload the .fit file to the files section of this group?

      Ron Wodaski



      On Oct 1, 2012, at 8:51 AM, CurtisC <calypte@...> wrote:

      > I'm preparing a general talk about CCD imaging for our club. I dug up one of my very first images from several years ago to show an image without flats, to show their necessity. The corners, where illumination is weakest, are *lighter* than the center, opposite of what I would expect. Why? Is this an artifact of the original processing, which was with the contrast and lighter-darker settings in CCDOps?
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