Description:
I've tweaked the black point in this version to try and remove the unsightly band that has appeared at the bottom (or top when I forget to reorientate) my images. I am not sure what this artefact is due to. From discussion with other veterans of the Meade DSI IIC era, perhaps noise, which I'm hoping a nearly completed Peltier cooler mod will resolve, or possibly a damaged array...I won't start dreaming of a new camera just yet.
I also reduced the saturation, which I prefer, although at a slight loss of depth. Either way, it is a lovely nebula, and there is definitely a hint of that OIII blue amidst the hydrogen emissions.
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Description:
I thought it would be interesting to demonstrate the impact of narrow band filters on these emission nebulae, for anyone who is unconvinced or still dithering...or dreaming of one for Christmas. They are expensive, and mine a cheapish import, but still performs very well, and suits my cheap secondhand OSC camera.
This 'full' spectrum, white light image, taken through an IR cut filter to reduce star bloat (apparently) only just starts to capture the nebula, but without the rich colour, detail, extent or sharpness - a much faded 'replica'. These images were processed exactly the same in Startools, the only differences in capture - framing, orientation and exposure (44m total with 120s subs).
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