The Swan M17 (Wes Smith)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · Lobster Nebula · M 17 · NGC 6618 · Swan Nebula · omega Nebula

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The Swan M17

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The Swan M17

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"The Swan has always been one of my (many) Favourites but here's my dilemma. I used a UHC filter thinking that it would enhance the Nebulosity ( which the physics says it does) however the old problem of the colour balance skew appears.Here are 2 options that I have post-processed in Gimp (probably different work flows) . At this point in time I think the mono version is the best 245 lights . I also used the 'Best percentage " in DSS which used 188 lights instead of total of 245 which reduced star bloom .. I suspect I need to get some unfiltered RGB data to add???? All shot at 3.2 Sec at ISO3200."

09/06/2020 Post Edit. Now with new editing tools such as Star Tools /Photoshop the colour inballance could be easily fixed.

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Description: At this point in time I think the mono version is the best 245 lights . I also used the 'Best percentage " in DSS which used 188 lights instead of total of 245 which reduced star bloom .
Post edit. In Bortle 1 skies I'd try with no filter next time and blend in the UHC data. Also with Star tools using Stars for white balance one should be able to introduce accurate Colour :)

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Astrometry.net job	3589844
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