Popular Post +RonC Posted July 23, 2021 Popular Post Share Posted July 23, 2021 Well I tried this object with the Tri band filter on the Canon 1000dm, not entirely happy with it as I expected more Green and Blue to show in the image?? This is 40 x 180s at ISO 800 with the usual kit. Nearly a full Moon and clouds drifting in and out all night! ! 8472, +Glafnazur, +Derbyshire Dave and 3 others 6 Link to comment Share on other sites More sharing options...
Clive Posted July 23, 2021 Share Posted July 23, 2021 Is the Ha overwhelming the other colours? If you remove the red layer, what's left? If their is enough there perhaps try backing of the red layer? With my unmodded Canon 200 (which, if you believe the internet, has a sensitivity of only about 10 to 15% at Ha) the veil has roughly equal teal/blue (Hb?) to red (Ha) regions (which possibility aligns with my understanding that the Hb emissions intensity are only about 20% of the intensity of the Ha emissions?) +RonC 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted July 23, 2021 Share Posted July 23, 2021 Ron would it be possible to post the fits file to play with .. Link to comment Share on other sites More sharing options...
+RonC Posted July 23, 2021 Author Share Posted July 23, 2021 Do you mean the TIFF file? Link to comment Share on other sites More sharing options...
Bottletopburly Posted July 24, 2021 Share Posted July 24, 2021 10 hours ago, RonC said: Do you mean the TIFF file? Yes tiff ron 👍 Link to comment Share on other sites More sharing options...
+RonC Posted July 24, 2021 Author Share Posted July 24, 2021 (edited) Autosave https://www.dropbox.com/s/sz39k8lnsljjf3a/Autosave117.tif?dl=0 After DSS adjustments! https://www.dropbox.com/s/qmjt7i4tftbjh4s/NGC6992210721F.TIF?dl=0 Edited July 24, 2021 by RonC Bottletopburly 1 Link to comment Share on other sites More sharing options...
Peter Shah Posted July 25, 2021 Share Posted July 25, 2021 the full moon will drown out the shorter wavelengths....you might see more green on a new moon.....rare I know..... but a super shot especially with the challenging conditions +RonC 1 Link to comment Share on other sites More sharing options...
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