Stacking help.

[Adamar98]

Hi,

I've collected some data over a few nights. Ive thrown all the files in to DSS. Each nights session in to its own group. My r,g,b images have all come out fine. My luminance image is coming out a bit odd. Ive never come across this before. Ive checked each sub and the all seem fine. Most of the image seems fine, its just the bottom right i seem to be getting the problem. Does anyone have a clue whats going on? Ive never used PIxinsight to stack my images before, so ill be having a read up and try throwing the data through that. See if i get the same results. If anybody knows whats happened or what im doing wrong then it would be great to hear from you.

Cheers

Adam

[Owmuchonomy]

Ey up. This happens to me or rather has happened recently but not in the past. I have started to see a 'melt' effect in part of my DSS Tiff output file. I don't know what causes it and I've asked on here before. I would love to know. I do however have a work around. I run my normal stack with lights, darks and bias but exclude my flats. I then stack again but this time include the flats. The result is then fine every time. I've checked my flats etc., but cannot find a reason. All I know is the work around works.

[Adamar98]

Cheers for that. I'll give it a try.

[Adamar98]

Ey up again (I just got the 'ey up' reference) You've got some great images on your flickr. I'll let you know if the work around works.

Cheers

[Owmuchonomy]

Thanks. Yes let me know. Maybe we can figure out why?

[Adamar98]

You're spot on Chris. I've just ran it all through again with no flats and it's come out fine. Why would the flats create a problem like this? Very strange. I've just checked my flats and I can't see anything unusual about them.

[Adamar98]

All I can think is that I've moved the light panel away and the flats have not finished. I've removed the last 3 flats from both of my data sets. Just ran it through DSS again and it's come out fine.

[Owmuchonomy]

All I can think is that I've moved the light panel away and the flats have not finished. I've removed the last 3 flats from both of my data sets. Just ran it through DSS again and it's come out fine.

I'm in the dark, pardon the pun, with this one.  All I know right now is my workaround works.  Glad you sorted it.  

[D4N]

I think it's worth checking your calibration frames are all ok before stacking them into a master. I think the PI tool for this is blink, it lets you flick quickly between frames to make it easy to spot problems. It also lets you apply an identical stretch to all of them.

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