Ha chicken

[blink138 (Pat)]

can someone please tell me if this was the right thing yo do
all ha from my dslr
the first pic is all stacked in dss with a number of darks and slightly tweaked
the second is from ps tweaked and basically i just turned the saturation slider to zero
piggybacked
canon 60da
canon 70-200 f 2.8
@200 f4
29 480s lights
21 480s darks

i hope to get some normal rgb soon ................ but that will be another question!
pat

[that_guy (Tony)]

What I used to do when I was shooting Ha with OSC was to open the stacked image on photoshop and extract the red channel of the image and used that to process as all the other channels are more or less useless.

[luka]

I used to convert the RAW files to TIF and then extract the red channel (using dcraw and octave) before stacking.

Alternatively, is it possible to set the DSS not to Debayer the images, i.e. to process them as mono? Then you can extract the red channel afterwards in PS. Debayering will mix the channels and you want to avoid this. As Tony said the other channels contain only noise and there is no point adding that to the image.

[blink138 (Pat)]

how do you "extract" a channel?
pat

[blink138 (Pat)]

i have heard of debayering, but i am unsure how or if it is done in dss
pat