'L plate' question - what am I looking at?

[heathenwoods]

Hi,

Thanks for looking at this. I'm muddling along with stacking widefield images taken with my bridge camera (Lumix Z38) and keep coming up against the same problems.

I have reasonable luck getting rid of light pollution with this guide so I have relatively dark skied images to stack. The problems set in once DSS has done its stuff and I keep ending up with blue-ish 'noise'. The attached image gives a clear idea of what I mean. The .tif that DSS outputs is pretty much the same, just bigger.

What is the bluey stuff? Can I get rid of it or is it something to do with how the photos are being taken/the camera?

I'm not expecting any great shakes but just get the hang of things before I upgrade my camera later in the year...

Any advice appreciated. Cheers.

[cfpendock]

Sorry for my ignorance...what is DSS?

[c3po]

Sorry for my ignorance...what is DSS?

DSS i think in this case means Deep Sky Stacker - a free tool used to 'stack' multiple subs in order to pull out the detail from the many tens, or even hundreds, of images you've taken with your DLSR to present a single highly detailed final image ready for post-processing in an imaging software such as PhotoShop or the like.

[heathenwoods]

Yep, sorry, Deep Sky Stacker.

[cfpendock]

Thanks.....it sounds interesting, I'll look that up.

[JB80]

Have tried to stack them first and then try the light pollution technique of the final tiff?

I would try that if you haven't already done so.

[heathenwoods]

Thanks Pibbles, I'll give that a go.

[RikM]

I would agree with that. Stack the unmolested images and the do the processing on the final stack.

[JB80]

If it doesn't work then that's me out of ideas.

If it does, then great. It'll probably save you some processing time.

[heathenwoods]

Well, I think I'm heading in the right direction thanks to your suggestion. Ive now got an enormous tif file that looks a bit like the attached image.

I *like* to think that the cloudiness if the Milky Way (which I was, as much as I could tell, pointing my camera at). Regardless, the blueyness is gone! Thanks :-)

(Now, the reddish tinge... I'll have a play with curves etc)