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MartinFransson

Cygnus Loop finished, 13 hour Ha+O3

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Last night I finally managed to get some more O3 data for my Cygnus Loop image.

Despite being captured during full moon (Ha) and 80% moon (O3) the faint structures are visible. I guess those 3nm filters really do work!

94*5 minutes of Ha
66*5 minutes of O3

Zwo ASI1600MM-Cool + Canon EF 300/4L IS lens @f/4.

Processed as bicolour with synthetic green from 30% Ha and 70% O3.

Unfortunately I´ve got weird star shapes in the outer parts of the image due to the lens I used, but I might make a separate stack with just the best subs for stars or I might replace them with RGB star later on.
Still very happy with this one!

Cygnus-Loop_bicolour_Ha-94x5_O3-66x5.jpg

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One I wish to try now I have a very short scope at 330mm, if I get a result half as good as this I will be pleased.

Alan

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Lovely image Martin. I would also be proud with that result :)

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On 20/09/2019 at 05:40, alan potts said:

One I wish to try now I have a very short scope at 330mm, if I get a result half as good as this I will be pleased.

Alan

Go for it!! 😀

This one has strong signal in both Ha and O3. I was very surprised at how strong the O3 was.

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Very nice--well balanced and centered.

Rodd

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6 hours ago, Rodd said:

Very nice--well balanced and centered.

Rodd

Thanks Rodd! I put quite a lot of time on framing my subjects. Old habit from being a regular landscape photographer :)

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This is fabulous.  Your investment in time to collect that huge amount of data has really paid off!

It's my next clear sky project with my wide-field rig.

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