Quote:
Originally Posted by cometcatcher
Looks really nice Colin. The stars are a bit strange in narrow band but I'm sure you will get the hang of that in no time.
Getting everything looking right in narrow band is a whole new learning curve isn't it? I think when I do get an astro cam it will be OSC.
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It’s been a year since I last played with this data but last time I did try to go starless before processing and there just wasn’t enough data. My spacing was a few mm away from correct so I have some bad star shapes and there was a meridian flip involved so I’ve got a few conflicting bad star shapes in different corners all conspiring against nice round stars. After removing all the purple halos it left some weird funkiness.
I’ll have to have another go at full star removal!
Quote:
Originally Posted by gregbradley
250 iterations of decon in one hit is asking for trouble. The problem is it sharpens up the noise as well, tends to put rings around stars etc. So your image is a tad noisy in the full rez image.
Its better to do several decon levels and blend them in at different opacities and only the bright areas not the dimmer areas to avoid emphasising the noise.
There is a nice amount of detail in the pillars.
Greg.
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I’ve found that there isn’t much of a difference between 100 iterations and 250. I find myself generally making 3-5 star masks for the different star sizes and then creating a master star mask out of those adding different intensities to get a decent protection on everything but the smallest of stars. It’s only the smallest stars that have less contrast than nebulosity that haven’t been protected.
You are correct on the noise however. I found that I could easily remove that with some kinds of noise reduction but decided against it as i also lost some finer details. I’m planning on a test print soonish and i don’t imagine that it’ll be visible in print.
My main purpose of this was to thrash the approx 1.5 hours of Ha to give up as much detail as possible
Quote:
Originally Posted by willik
Nice image Colin just need to tone down the colour on the stars or add some RGB to ease on the pinkish stars. narrow band is not easy very good effort.
Martin
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Pink stars? Apart from a few tiny orange ones they’re all white.