Author Topic: M33 - Triangulum Galaxy  (Read 2445 times)

Offline Lex

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M33 - Triangulum Galaxy
« on: 2011 October 14 03:55:16 »
Hi,

I think that this is a pretty difficult object. I have managed to collect some 2.4 hours of good quality data.
The only thing I see is that i am not able to keep the fine interarm-nebula until the end of processing??
Perhaps to heavy stretched??
Also i did have to much green sources successfully removed by SCNR, but then my Red signal got also in trouble...
As you can see on the Pic some stars are pinkish and this bothers me kind of...  ???

Picture Specs:

2.4 hrs exposure
L 3600s Bin1
R 1800s Bin2
G 1500s Bin2
B 1800s Bin2

90 / 600 APO Triplet on CGEM
AstroArt 5 as capture/guiding soft
100% PI processed with the usual steps of logic processing



So as always, bomb me with critics   ;)

Cheers

Lex

Clear Skies!!

Lex

______________________________________

AZEQ6 GT, TS UNC 10" f5, ASI1600mm-c

HADSO (Hagen Deep Sky Observatory)20 km W of Luxemburg City

Offline roberto_volpi

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Re: M33 - Triangulum Galaxy
« Reply #1 on: 2011 October 14 12:19:44 »
Hi Lex, more problems than Elephant's Trunk.
Colour is not good, M33 is cian/green not brown, you must work on color calibration.
It's difficult for me to explane in english, before rgb cobination you must stretch each channel at the same level (linear stretch), combine its without luminance and after apply SCNR to remove green in ecces. When you are arrived to a good colour combination, apply stretched luminance.
Roberto

Offline Lex

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Re: M33 - Triangulum Galaxy
« Reply #2 on: 2011 October 14 12:49:38 »
Roberto,

Thank you for your remarks!
In fact i never worked with the linear stretch, i always level the channels manually.
But I will try to follow your directions and post the update Picture when reworked.

Thanks

Lex
Clear Skies!!

Lex

______________________________________

AZEQ6 GT, TS UNC 10" f5, ASI1600mm-c

HADSO (Hagen Deep Sky Observatory)20 km W of Luxemburg City