whats happened to cent a?

[blink138]

hello members does anybody know what happened to my stack?
i did notice when i tried the RGB that each channel seemed to have two peaks!
thanks in advance

[Peter.M]

Your subframes are offset from each other, while the galaxy is in all of the frames it is not in the same place in the picture. The multiple peaks in the histogram represent the differing levels of background in each section.

In DSS you have a few settings with diagrams which will illustrate your issue. In stacking settings under result there is standard mosaic and intesection.

Unfortunately these settings will not do you much good in this case (as I think the resultant frame from a intesection mode stack would be too limiting) The best course of action is to keep the object in the same spot each picture.

[blink138]

thanks peter, looking thorough all of the lights they didnt seem to move that much
thanks
pat

[blink138]

ah it lines up now! i must have thrown an unwanted one in there too
can anybody tell me of any improvements?
i did try a couple of exposures at 1:15 secs before some clouds rolled in but they were a bit wobbly
1000d
15 @ 20
12 @ 40
10 @ 55
pat

[blink138]

ooh just looking at the picture it is very big
may try and shrink it

[ZeroID]

I wouldn't. I think it's an awesome pic, very real. Good stars, subtle colours and good depth.
I'd add more frames to get more detail but I reckon it looks just like it should if you had 250mm aperture eyeballs. :camera:

Well done IMHO.

[blink138]

oh wow thanks brent!
pat