PixInsight Forum (historical)

PixInsight => Tutorials and Processing Examples => Topic started by: Viorel Chita on 2018 March 19 09:58:08

Title: Pedestal settings
Post by: Viorel Chita on 2018 March 19 09:58:08

I am confused about when and how to specify a Pedestal value during calibration.

First, I noticed that my FITS frames show a “PEDESTAL=-100” header when created with APT (Astro Photography Tool).  Did not see this when using Nebulosity for captures.  I’m using an SBIG-STF-8300C.

What should I do to handle this properly in PI?  Wouldn’t the values used impact the ability of PI to scale darks?
Will it also mean that I can never rely on PI to proper scale darks unless I trust CCD + Driver + Image capture software to provide the right result (pixel values and PEDESTAL)?

Thank you,
Viorel