DSS and Ha via a DSLR - Help Please

[johnb]

Hi

I have some images taken with the kit in my signature and I have added a Ha 7nm filter

if I look at the raw image its pretty red (as expected)

Now what setting do I use in DSS to stack to produce a single Ha image, I assume the end result will be red ?, i see in the forum Ha images are often shown as monochrome ?

Oh they are 300 sec images

regards

John B

[Freddie]

You stack a Ha image in DSS the same way you would stack any images. You may just need to adjust the star detection to ensure DSS detects enough stars.

[JohnC64]

The other thing to do once you have stacked the images is to extract just the red channel only and discard the green and blue. The G & B will just contain noise (maybe some faint signal) and the red channel will contain the Ha image. You then process the red channel as normal. - by extracting the red channel, this will give you the monochrome image

[johnb]

Thanks for that, were do I extract the Red Image - is that a photoshop thing ?

John B