What am I doing wro...
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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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What am I doing wrong? Should be simple quick answer for any who might know

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White Dwarf
Joined: 3 months ago
Posts: 6
Topic starter  


for APP forum

I wanted to do a 'quick' stack.

I loaded 28 frames from ZWO 2600 mc pro.

I loaded 30 Flats and 30 darks.

Lights and darks are all Gain 100 Exposure 120 seconds.

Flats via auto-mode of the 2600mc pro were 5.9 seconds.

After loading I clicked on integrate and I get a warning about


OK I'm new to all of this and truthfully don't know how to shoot masterdarks or masterflats.

I would have thought (with a little googling) that APP would have done the math on the

masterdarks/masterflats or done some work around.

I'm trying to get away from DSS but if I dumped these 3 sets of files into DSS I would have had

a file output.

Help please.

This topic was modified 2 months ago by Robert Moore

Neutron Star
Joined: 5 years ago
Posts: 107

It's basically saying you're missing Dark Flats or Bias.
It would still work, but probably get a better calibrated Integration if APP was able to subtract the some inherent noise not already removed (bias) or the noise from your Flats (with DarkFlats).

Universe Admin
Joined: 6 years ago
Posts: 5456

For flat calibration you either need bias or darkflats with the same settings as your flats.

White Dwarf
Joined: 3 months ago
Posts: 6
Topic starter  

Thanks you two for helping.

I have discovered my error I think. I'd changed targets and upped my exposures to 5 min's....but used the prior targets darks which were 2 min's. 

I say I think because I then threw it into DSS and it stacked them anyway.