wrong using Flats?
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2023-04-17: APP 2.0.0-beta17 has been released !

RAW support for camera color matrix with Bayer Drizzle integration, fixed couple of image viewer issues.


We are very close now to  releasing APP 2.0.0 stable with a complete printable manual...


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wrong using Flats?

2 Posts
2 Users
Molecular Cloud
Joined: 1 year ago
Posts: 1
Topic starter  

Hello everyone.

I have something wrong with the flats in the calibration process.
I use Flats, Master Dark and MasterFlat for calibration.

Because it doesn't do what I want properly, or I'm just a bit stupid to understand it correctly

here the comparison of the only strached output pictures

  • first:

without APP - nice flatted

Cal+Stack by DSS, some streched & Color balamced by PS

  • Kal + Stack DSS   strech + just PS

  • second:

with APP - only pollution gradients?

cal by DSS, then integrate wirh calibrated Lights only

  • third ---> MY PROBLEM:

only used APP (cal, stack, normalized, integrated, streched) - strong vignetting? 

  • M 52 46fr lpro LPro session 1 nur mit APP


and the Flat:

MasterFlat Gain90


I dont removed any gradiends


It is made up of 43 x 300s. RGB frames (ASI071MC Pro) Gain 90, Offset 65, -15°C near fullmoon

I left all settings at default


Maybe someone will recognize what I'm doing wrong


Thanks a lot 🙂


This topic was modified 11 months ago 2 times by Tom

Universe Admin
Joined: 6 years ago
Posts: 5456

Difficult to tell as I don't know DSS myself. I can check the data to see what's going on if you want, if so, please upload like 10 lights, 10 darks, 10 flats, 10 bias (or darkflats) to our server (please use the login and password provided below):