Drifting contrails and clouds ... Outlier stacking...

[Psychobilly]

Ok my first night for ages was "ruined" by persistent drifting contrails and small clouds...

It was the first tiem out with the 24-105mm f4L which due to the clouds i decide to use at 105mm unguided on the EQ3-Pro with my usual Widefield method of quick PA using the polarscope and manually starting Sidereal tracking..

I ended up with hardly any "clear" subs... only some of the shorter 60s subs were clear of all cloud a handful of 120s ones and only one 180s one...

The clouds were moving between frames so I thought I would just chuck the whole lot in to a Kappa Sigma Stack in DSS and see what happens..

I was quite suprised with the result... Total image time is 1h 16mins at f4 ISO 400...

Peter....

[martin_h]

I always use Kappa Sigma, it hides a multitude of sins.

[Doghouse]

Beautiful.

[Psychobilly]

I always use Kappa Sigma, it hides a multitude of sins.

Me to.. but normally I reject any subs with small patches of cloud or contrails but leave in the ones with satellite or aircraft passes...

This time I gave DSS all the files as I had lost so many to "patchy cloud"...

I guess it will only "work" if the clouds are moving between frames...

Peter...

[jgs001]

Nice result Peter, that stack has done a great job on that.

[RikM]

That's come out wonderfully Peter. Which camera did you use for that? Was it modded?

[Psychobilly]

Thanks,

It was a BCF Modded 1000D with Hutech IDAS P2 MFA Filter

It really needed another couple of hours worth of data but I was completely clouded out by 01:45 am