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Nigel G

Rosette Nebula Ha OIII Bi colour

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I had a lucky 3 hour clear slot last night again, almost ruined by my imaging PC not firing up, I twiddled and poked a few wires inside and got it started. I decided to take OIII on the Rosette to add to the Ha I have. Quite pleased I did now. I got 1h 42m of good subs. Processed both then layered in StarTools. So many different variety's can be made by shifting the amounts of Ha & OIII. This is my favourite so far.

The OIII seems to give the image depth.

Rosette Nebula.
15x360s Ha & 17x360s OIII ISO800
Canon 1200d modified with 12nm Ha & OIII filters.
Equinox 80ED Pro.
Guided EQ3 Pro.
Stacked with darks, flats and bias in DSS
Processed in StarTools.



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Agreed about the 3d effect. I think it is the way the pink at the top of the central 'hole' get gradually deeper red as it gets towards the inner edge. Nice one. 

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Thanks for your kind comments.

4 hours ago, tooth_dr said:

That’s Great! You’re getting on well with the oiii filter. 

I have enjoyed the narrow band filters, getting to know what is needed, 6 minutes seems to be the right amount for OIII, much less banding too :) 


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