flat calibration problem

[pbonet1]

very good, I have a problem when calibrating brachprocessing pictures, the flats or flat master I say lame, not the well-calibrated, in the final image I created a gradient very steep, to say that the images are taken with a CCD camera , someone could help me, thank you very much.

[jkmorse]

Can you give a bit more detail and possibly attach an image?  What type of camera or CCD are you using and what program did you use to capture the flats?  Those details will help in getting to the problem.

Good luck,

Jim