Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Multiple Night Stacking Issues

Astrophotography
  • Please log in to reply
5 replies to this topic

#1 soggywaffles

soggywaffles

    Vostok 1

  • *****
  • topic starter
  • Posts: 114
  • Joined: 09 Nov 2021

Posted 14 April 2024 - 05:14 PM

Hello everyone, I have been having an issue to where when I stack two nights of data together it creates light spots in my image. However when I stack them separately they don't make these spots.

 

I'm using Deepskystacker to stack the images and my camera is the SV405CC (IMX294 sensor).

 

 

1st night: https://drive.google...iew?usp=sharing

 

2nd night: https://drive.google...iew?usp=sharing

 

Both together: https://drive.google...iew?usp=sharing

 

 

First Night Master Flat: https://drive.google...iew?usp=sharing

Second Night Master Flat: https://drive.google...iew?usp=sharing



#2 auroraTDunn

auroraTDunn

    Viking 1

  • -----
  • Posts: 670
  • Joined: 01 Sep 2017
  • Loc: North of Boulder, Co.

Posted 14 April 2024 - 06:20 PM

Just a rapid, first gut reaction thought, do you have 2 different sets of flats used appropriately with the separate stacking and only using one of them for the combined? The thought being is something changed the between the sets of images and flats???


  • soggywaffles likes this

#3 powerslide

powerslide

    Vostok 1

  • -----
  • Posts: 154
  • Joined: 24 Aug 2023
  • Loc: Sydney, Australia

Posted 14 April 2024 - 06:24 PM

Are you grouping the flats properly with the appropriate night or are you just using all the flats with all the lights? If you are not your will need to use separate groups with the flats in the correct group and not in the main group... Sorry been a while since I have used DSS so not sure what the tabs at the bottom are called (use WBPP now).


Edited by powerslide, 14 April 2024 - 06:25 PM.

  • soggywaffles likes this

#4 soggywaffles

soggywaffles

    Vostok 1

  • *****
  • topic starter
  • Posts: 114
  • Joined: 09 Nov 2021

Posted 14 April 2024 - 06:31 PM

Just a rapid, first gut reaction thought, do you have 2 different sets of flats used appropriately with the separate stacking and only using one of them for the combined? The thought being is something changed the between the sets of images and flats???

Im using two sets of flats for each night. However On the first night I only got 10 flat frames and the second has 25.



#5 soggywaffles

soggywaffles

    Vostok 1

  • *****
  • topic starter
  • Posts: 114
  • Joined: 09 Nov 2021

Posted 14 April 2024 - 06:32 PM

Are you grouping the flats properly with the appropriate night or are you just using all the flats with all the lights? If you are not your will need to use separate groups with the flats in the correct group and not in the main group... Sorry been a while since I have used DSS so not sure what the tabs at the bottom are called (use WBPP now).

Using two sets of flats, one for the main group and one for the second group.



#6 powerslide

powerslide

    Vostok 1

  • -----
  • Posts: 154
  • Joined: 24 Aug 2023
  • Loc: Sydney, Australia

Posted 14 April 2024 - 06:42 PM

Using two sets of flats, one for the main group and one for the second group.

From memory the flats in the main group will be used for calibration with all Lights, not just the lights in the main group. You will need to create a third group and have the lights and flats (from main)_ there. Darks and biases/dark flats if common can be put in the main group.

 

At least that was how I did multiple nights with DSS.


Edited by powerslide, 14 April 2024 - 06:43 PM.



CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics





Also tagged with one or more of these keywords: Astrophotography



Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics