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Old 12-07-2008, 03:30 PM
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Bassnut (Fred)
Narrowfield rules!

Bassnut is offline
 
Join Date: Nov 2006
Location: Torquay
Posts: 5,065
Gee thanks Guys, glad you liked it.

The soft stars were on purpose, they look bad too sharp, colour in them is a problem I always have. On the meade, RGB stars are huge, its a struggle getting them to the same size as the tiny Ha (lum) stars to avoid halos, hence the colour gets squashed too. The dust lane detail in the middle sharpenning is where it could have been better. Yes, the Ha lum does swamp RGB colour, I havent got round to the adding Ha to RGB trick yet, Im just getting used to multiple layer masks.

All this teasing is made possible by lots of data, but not necessarily a real increase in depth. That can still be limited by sky glow and sub exposure length. Also, its a trade off bettween sharpening good data and stretching thin data (cant stand much processing) and just showing blury noisy fuzz.

And for my pics anyway with my home rig, the surrounding dim reflection nebula (especially the blue in this pic) is really difficult, or near impossible with 3nm Ha, it more suits emmission nebula, and with 20min subs in urban skies, makes it a no go unforch.

The Lum filter would be better, but then I loose detail, and the ability to image during moon-up. To get a megadata project done in a reasonable time, the bulk of it (Ha) can be done during moon shine if need be, If I used LRGB it would all have to be on moonless dark nights, which could takes weeks, or months.
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