Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Nebulae in Cygnus

  • Please log in to reply
4 replies to this topic

#1 ajaymandke

ajaymandke

    Explorer 1

  • *****
  • topic starter
  • Posts: 75
  • Joined: 16 Nov 2011
  • Loc: Houston, TX

Posted 14 June 2018 - 10:54 AM

Here are couple of famous targets from Cygnus constellation imaged using modded Canon T3i using Omega Optical NPB filter with band pass for Ha, Hb and OIII. Imaging scope was SV110ED on Losmandy GM811. Processed in PI and post processed in PS.

 

Any tips on how to get accurate star color and fix elongated stars in the corners.

C&C are welcome.

Tulip Nebula:
picture-0ffbccd2f396460ef461f3fdf3c36747

 

Pelican Nebula:

picture-0a0194dbe2fc0da7b0180518fbcd65fe

Ajay


  • artem2, Jason_Lyman, ks__observer and 5 others like this

#2 Goofi

Goofi

    Cosmos

  • *****
  • Moderators
  • Posts: 7815
  • Joined: 03 May 2013
  • Loc: Coastal Southern California

Posted 14 June 2018 - 02:49 PM

Ajay, those look good.

 

But, some bad news on star color. The filter you are using is going to make star color challenging. You're basically capturing Ha onto the red part of the bayer matrix, Oiii and Hb onto the green/blue. You're basically doing narrowband with your color camera and this distorts the final color since stars are broadband targets.

 

The easiest way to get star color is to take some images without the filter and use the RGB stars for their color, with the nebula captured using the filter. Otherwise, you have to do some creative tone mapping.


  • Bretw01 likes this

#3 BlackPitchPL

BlackPitchPL

    Sputnik

  • -----
  • Posts: 32
  • Joined: 12 Aug 2017

Posted 14 June 2018 - 11:58 PM

I really like the photo's keep the good work.

Wysłane z mojego MI 6 przy użyciu Tapatalka

#4 ajaymandke

ajaymandke

    Explorer 1

  • *****
  • topic starter
  • Posts: 75
  • Joined: 16 Nov 2011
  • Loc: Houston, TX

Posted 17 June 2018 - 10:12 AM

Ajay, those look good.

 

But, some bad news on star color. The filter you are using is going to make star color challenging. You're basically capturing Ha onto the red part of the bayer matrix, Oiii and Hb onto the green/blue. You're basically doing narrowband with your color camera and this distorts the final color since stars are broadband targets.

 

The easiest way to get star color is to take some images without the filter and use the RGB stars for their color, with the nebula captured using the filter. Otherwise, you have to do some creative tone mapping.

Thanks Goofi.



#5 ajaymandke

ajaymandke

    Explorer 1

  • *****
  • topic starter
  • Posts: 75
  • Joined: 16 Nov 2011
  • Loc: Houston, TX

Posted 17 June 2018 - 10:12 AM

I really like the photo's keep the good work.

Wysłane z mojego MI 6 przy użyciu Tapatalka

Thanks Blackpitch




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics