Quote:
Originally Posted by alistairsam
Hi Paul,
I've taken a Ha sub with an OSC at 2x2 and found it a lot softer. as you mention, yes, Ha data will only be present in the red channel, so if you take it at 1x1, you'll need to extract the Red and use that as Lum. Atleast that's what I've read and tried.
It'll be interesting to compare a Ha frame at 1x1 from the Red channel and a Ha at 2x2. I guess you could decide after that.
Cheers
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I'll definitely be trying that. One more night and then I have 3 off so hope is in the air
Quote:
Originally Posted by LewisM
Nice image indeed, but I think your Northgroup suffers the same CA and "softness" of focus mine did.
Wish I could guide at the moment, let alone take any pictures.
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I haven't been able to take too many Pictures with the ED127 up till now and when I did the original focuser was terrible. I have since replaced it with a 2.5" moonlight and it is miles ahead. I'll get new pics over the next couple of months and I'll keep a look out for the softness that you metion.
all the best
Paul