Cosmetic Correction problem

[Julien563]

Hello evryone,

 I would like to know one thing:

 First of all, i did my MASTER BIAS, MASTER FLAT and MASTER DARK.
When i calibrated my pictures with Masters, i founded dark bands which represented bands of my BIAS with STF. Is it normal?

Image : http://zupimages.net/viewer.php?id=16/32/m3si.jpg

Secondly, i did my cosmetic correction and i have an incredible increase of noise on my frames from the preview! How can i solve that?

Whithout CC : http://zupimages.net/viewer.php?id=16/32/u5gi.jpg

Whith CC : http://zupimages.net/viewer.php?id=16/32/6zte.jpg

Thx in advance

Julien from France

[vicent_peris]

Hi Julien,

Hello evryone,

 I would like to know one thing:

 First of all, i did my MASTER BIAS, MASTER FLAT and MASTER DARK.
When i calibrated my pictures with Masters, i founded dark bands which represented bands of my BIAS with STF. Is it normal?

Image : http://zupimages.net/viewer.php?id=16/32/m3si.jpg

Yes, most of the time bad columns have an erratic behavior that cannot be effectively corrected through calibration.

Secondly, i did my cosmetic correction and i have an incredible increase of noise on my frames from the preview! How can i solve that?

Whithout CC : http://zupimages.net/viewer.php?id=16/32/u5gi.jpg

Whith CC : http://zupimages.net/viewer.php?id=16/32/6zte.jpg

You cold pixel correction sigma value is way low, you need a much higher value.


Best regards,
Vicent.

[Julien563]

Thx a lot for your answer!

Best regards