I saw some pictures from the pros have a combination of narrowband image to its LRGB image. I wonder how they put the narrowband channel together with RGB? Since there only 3 channels of RGB?
I know sometimes I notice that they put Ha layer as Luminance, but I think this one is totally different. Are they stacking the narrowband frame with one of RGB channel before processing in Photoshop/PI? If so, into what channel is preferable? Is there any special move to stack them?
I talk about nebula pictures that have blueish tint on it...
most people blend in NB with one of the channels at a time. more often than not it will be Ha and o3. they could also create a synthetic luminance and layer it in that way also, or do both.
Thanks russ, I just learned from your flickr collection.
Beautiful pictures!
Regards,
Yusfi
Quote:
Originally Posted by rustigsmed
hi Yusfi,
yep there is no hard and fast move to do it.
most people blend in NB with one of the channels at a time. more often than not it will be Ha and o3. they could also create a synthetic luminance and layer it in that way also, or do both.
not that i have done it but don't some people create a star mask and replace the NB stars with RGB ones? it is usually the stars that look strange in NB images.
I am wondering about combining OSC images and Narrowband. I have two identical Canon DSLRs (cooled) one mono and one colour, identical sensor pixel size etc. The colour camera is full spectrum, so picks up much more Ha than a stock filtered camera, but is limited by the Bayer Matrix as to how much Ha it can gather. The mono camera however, can be pure Ha with a Ha filter. If I make a OSC stack, and a Mono Ha stack, and register them together like I would for a pure narrow band composite, is there any reason they cannot be layered together in PS?
Hmm, maybe luminance as well.
I am wondering about combining OSC images and Narrowband. I have two identical Canon DSLRs (cooled) one mono and one colour, identical sensor pixel size etc. The colour camera is full spectrum, so picks up much more Ha than a stock filtered camera, but is limited by the Bayer Matrix as to how much Ha it can gather. The mono camera however, can be pure Ha with a Ha filter. If I make a OSC stack, and a Mono Ha stack, and register them together like I would for a pure narrow band composite, is there any reason they cannot be layered together in PS?
Hmm, maybe luminance as well.
No reason why not at all
Below is a sequence of ngc 6164
done on a canon
straight RGB
Ha RGB
Ha Oiii RGB
the antennae galaxy was a mix of old RGB data from my canon 600d and a few subs of luminance from my QHY22.
I use RegiStar which figures out image scales and orientations. makes life way easier. as you know we are talking about different sized images. but i also need to use PS.
edit: found the original canon antennae with no luminance from the qhy22.
Hi Russ, on your Ha OIII RGB image, did you stack the Ha and OIII together? and make them as Luminance layer in Photoshop? or how?
Quote:
Originally Posted by rustigsmed
No reason why not at all
Below is a sequence of ngc 6164
done on a canon
straight RGB
Ha RGB
Ha Oiii RGB
the antennae galaxy was a mix of old RGB data from my canon 600d and a few subs of luminance from my QHY22.
I use RegiStar which figures out image scales and orientations. makes life way easier. as you know we are talking about different sized images. but i also need to use PS.
edit: found the original canon antennae with no luminance from the qhy22.
Hi Russ, on your Ha OIII RGB image, did you stack the Ha and OIII together? and make them as Luminance layer in Photoshop? or how?
Hi Yusfi,
They were done separately.
From memory I merged the Ha with the Red channel, and the Oiii with the blue channel. So really its Red+Ha, Green, Blue+Oiii. hope that helps.
