Interesting indeed. Ha capture with a DSLR has to be reasonably difficult to pull off - it's such a strong filter. I wouldn't have thought that they were sensitive enough to build that much detail. Obviously they are. Thanks for showing me, and I'll try to do some Ha DSLR time this coming weekend as I'll be on that set of objects building on my own QHY-9 M20/8 data set.
Of course, it's all been ruined now with your latest Simpsonesque revelation....
I thought that the hair was a bit more ... well... this fella...
Interesting indeed. Ha capture with a DSLR has to be reasonably difficult to pull off - it's such a strong filter. I wouldn't have thought that they were sensitive enough to build that much detail. Obviously they are. Thanks for showing me, and I'll try to do some Ha DSLR time this coming weekend as I'll be on that set of objects building on my own QHY-9 M20/8 data set.
Of course, it's all been ruined now with your latest Simpsonesque revelation....
I thought that the hair was a bit more ... well... this fella...
LOL +++
Very nice Chris!
Re the Ha response of DSLRs - when they tell you it can't be done, verify it for yourself!! Just takes more exposure time to fill the wells!!
I've just bought an SII filter to test this theory!
Doug
Great work Doug. Colour confidence shines through with this image. The high saturation suits the field, especially M20. Stars show some alternating colour casts, but doesn't distract from scene. Well done.
Great work Doug. Colour confidence shines through with this image. The high saturation suits the field, especially M20. Stars show some alternating colour casts, but doesn't distract from scene. Well done.
Well, both of those are rubbish, over and under stretched , but I like the original colour image, very smick .
But, Fred they're not processed at all - they are the combined stacks of the Ha filtered subs from the 40D. Obviously the first one is totally blown out, but the point of posting them was to illustrate (for Chris) the Ha response of the DSLR not to present either image as a final result.
They worked out not too badly though when I blended them with the RGB to produce that final colour image you liked.
Doug
Fabulous effort, there. Pushing the DSLR to the limit, eh! Go on, buy a full frame CCD!
You're going to hate this, as it's something I've been identifying in a few of your images, but, I think you have a colour cast over your image, again. Sorry! It's most noticeable in the star field surrounding the nebulae, it appears as a magenta or red. Could this be the hydrogen alpha portion of the blend? I'd have expected the stars to be a bit golder, that's all.
Otherwise, you're cookin' with gas. And, then some!
But, Fred they're not processed at all - they are the combined stacks of the Ha filtered subs from the 40D. Obviously the first one is totally blown out, but the point of posting them was to illustrate (for Chris) the Ha response of the DSLR not to present either image as a final result.
They worked out not too badly though when I blended them with the RGB to produce that final colour image you liked.
Doug
Blah blah, dont care, the final colour pic is great .
, but I like the original colour image, very smick 
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