Cats Poor colour

xelasnave · #1 13-06-2023, 11:07 AM

Still testing the Askar (everything really).

About three hours, two minute subs, no darks or flats, using Luminance, red

, ha,S11 and O11...and still trying to work out which positions S11 and O11 are in the filter wheel

... so as with all my stuff we shall call it an artistic rendition...this time of The Cats Paw Nebula..I had to crop heavily because I made mistakes between nights framing...they say you learn by mistakes well I should be an expert at some point.

GEAR....Askar 130, ZWO Harmonic drive mount, ZWO 2600 mono, filter wheel and seven filters, EAF, smart phone..Deep Sky Stacker, Startools and Photoshop play around.
Although I have had this gear for a while I am still learning despite the interruptions from clouds and cancer

but although I have no idea about the colour I am very happy with the detail the Askar is delivering and very happy with the ZWO mount and the guiding and all that Asiar Plus makes routine...when I think of the old days..drift align for polar, focus by guess work..finding the objects etc...but now all on the phone.

ANY help and guidance as to where I should direct attention to make some forward progress much appreciated...in other words after the nice praise we share around here to encourage each other perhaps point out where I am missing the point...

alex

Nikolas (Nik) · #2 13-06-2023, 11:43 AM

Alex I know you are colour blind but the whole nebula is green with magenta stars, tone down the yellow and cyan for starters as this brings out more red colour in the nebula as for the magenta stars invert the image and do a green rem0val then invert it again

xelasnave · #3 13-06-2023, 11:49 AM

Quote:

Originally Posted by Nikolas

Alex I know you are colour blind but the whole nebula is green with magenta stars, tone down the yellow for starters as this brings out more red colour in the nebula as for the magenta stars invert the image and do a green rem0val then invert it again

Thanks Nik that is a great help.

alex

xelasnave · #4 13-06-2023, 12:54 PM

Nik I really tried but not sure if I have got anywhere...I don't give up usually but I think I must ... I personally am happy with this one in so far it seems the best of my results...still I welcome help.

alex

Nikolas (Nik) · #5 13-06-2023, 01:55 PM

Mate what a difference!!!!!!!! nice orange reddish hues great work!

xelasnave · #6 13-06-2023, 02:02 PM

Thanks Nik..I tried what you suggested but I just could not get rid of the green.but I made a difference....I know it's there by turning the saturation way up in the green channel in photoshop and it stands out..was better but finally I reprocessed in StarTools and mapped Ha to the red channel and the red stack to narrow band enhancement and left the green channel empty... that way I figured I would get rid of the green

Thanks again I appreciate the new ( to me) information.
Alex

Doogs38 (Alex) · #7 13-06-2023, 07:34 PM

Good job, Alex, of getting more yellow into into your lovely image. I prefer the yellow version and reckon you’re not far off achieving a more red image. I’m not familiar with Startools but it might have a ‘selective colour change’ function to gently tweak/alter colours (but requires masks). I occasionally use something similar in PI. Alex

oska (John) · #8 13-06-2023, 08:44 PM

WOW, that's a bloody ripper Alex. Tight and tidy, the detail is fantastic. Very well done Sir.

xelasnave · #9 14-06-2023, 09:52 AM

Thanks Alex and John.
Alex

AstroViking (Steve) · #10 14-06-2023, 10:56 AM

Nicely done, Alex. Looks like you're evicting those gremlins from your new setup.

Dave882 (David) · #11 14-06-2023, 12:30 PM

Looks really nice Alex and the colour in repro version is great to my eye. If you boost the saturation a tad it may bring out more of the colour- but seriously it looking really nice well done!

xelasnave · #12 14-06-2023, 10:46 PM

Thank you Dave and thank you Steve.
Alex

Bodon (Steve) · #13 15-06-2023, 10:33 AM

Nice photo Alex! Mate, if unsure about your filter position post a colour pic of your wheel with the back off. I know its a pain but "we might" be able to determine them. If you want to. Also if you did not install them its pretty common to install them LRGBSHO. So L at number 1.

JA · #14 15-06-2023, 10:39 AM

MEoooowwww Alex.
Very Nice pussycat reprocessed in the orange/salmon colours

Best
JA

xelasnave · #15 16-06-2023, 02:44 PM

Quote:

Originally Posted by JA

MEoooowwww Alex.
Very Nice pussycat reprocessed in the orange/salmon colours

Best
JA

Thank you Andrew..as I said I mapped Ha to red...that's my method to get rid of green

Alex

Startrek (Martin) · #16 16-06-2023, 03:57 PM

Alex,
Excellent Cats Paw
Well done !!
The repro Colour is really good, a typical SHO narrowband blend ( the saturated green is gone !!! )
Cheers
Martin
( posted from Dublin , Ireland )

xelasnave · #17 16-06-2023, 05:46 PM

Quote:

Originally Posted by Startrek

Alex,
Excellent Cats Paw
Well done !!
The repro Colour is really good, a typical SHO narrowband blend ( the saturated green is gone !!! )
Cheers
Martin
( posted from Dublin , Ireland )

Thanks Martin HA was mapped to red and that got rid of green...in future I just won't use the green channel

. Or map green to something else..luminance to be safe

I am a quarter Irish so ask around if anyone knows me

Alex

JA · #18 16-06-2023, 05:54 PM

Quote:

Originally Posted by xelasnave

Thank you Andrew..as I said I mapped Ha to red...that's my method to get rid of green

Alex

Huh ???

Best
JA