DSS Alignment Issue

[JohnnyD333]

Hi SGL,

I finally got a chance to image M1 and I feel that I got some great subs. I stack the subs in DSS, add my flats and darks, and the result is a swirling mess. The alignment seems very off, half the image is ok but the other looks like its rotating with a large chunk of the image totally pushed in. I dont know what I did wrong, never had this issue after using DSS for over a year. Anyone have a similar issue and if so, is there a solution. I feel like I may have accidentally changed a setting? I have alignment set to automatic and have plenty of stars. The two images were taken within a few minutes of eachother. Ill attach the resulting image DSS gave me after the stacking process. Only 2 300sec subs btw. Thanks:icon_salut:

JD

[dmahon]

Wow, wierd.

As it's only two subs, can you stick those up too? Even better, tell DSS to create a calibrated file for each frame in the "intermediate files" section and post those up, then we can see if the flats/darks/bias have screwed it up or if it is just the stacking process.

[JohnnyD333]

Thanks for the tip, Ill post them when I can today, but I think I figured it out (sort of).

Yesterday I sat and kept making small adjustments to see what the cause was. It does not do this when the flats were taken out. I was able to add one flat and it worked, but when I add my Master Flat (which was around 15 flats) it goes crazy. Its strange because I took M42 and the Horsehead on the same night with the same camera and focus. The flats worked fine for them, I dont know, maybe just a freak occurance:( Thanks again.

[Quatermass]

I had some issues with the setting in deep sky stacker as well and used the following setting to put it all right again if you keep getting errors you might like to try those settings there in my blog

[dph1nm]

Have you got it set to align RGB channels separately? If so, turn it off.

NigelM

[Black Knight]

Funnily enough, I experienced what looks like exactly the same issue the other day. I ran DSS on some files I had previously processed so I knew they were good. Well, good in the sense that DSS could process them properly . And I got a similar result. No amount of tweaking would fix the output.

In the end, I tried re-running another stack of images just to see what happened, and got exactly the same result. But because it happened to another stack of images as well, I started thinking that there was a problem with DSS itself.

So I removed DSS and re-installed it. Problem solved - at least in my case.

[JohnnyD333]

I havent had the problem since, but reinstalling the program sounds like a plan. I have been tinkering with the settings so much I may be making things worse. Im glad to see Im not alone on this one. Thanks all:)