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Old 29-05-2011, 05:18 PM
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multiweb (Marc)
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multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,080
Quote:
Originally Posted by troypiggo View Post
Thanks for showing me how it's done Wish the FoV was this wide for my shot.

Can I ask about the processing? How do you go about the Ha and the OIII? Do you play with the Ha first, stretch it etc until it looks like a good image in its own right? Then do the same with the OIII separately, so it looks like a good B&W on its own? Then combine them into the different channels?
Thanks Troy. Not showing anything mate. I'm just a n00b too when it comes to blends. Sometime they work, sometime they don't. Here's what I did for this one.

1_ As you've mentioned you stretch your Ha and Oiii as if they were standalone pictures, so you spread your dynamic range nicely to the limit noise will permit.

2_ You start an RGB file and copy paste the Ha in the Red channel, then the Oiii in the Green and in the Blue channels in PS.

3_ You then do a bit of noise reduction mostly in the blue channel and use curves and levels to boost it.

4_ Use saturation as well to get the colors popping out a bit more.

Then I combined the grayscale Oiii and Ha layers as a separate Luminance layer then set it to Luminosity. Then duplicated the underlying color on top of the lum as soft light. By doing this you boost the details in the color from the Ha mostly without affecting the colors too much. You set the lum opacity and the color softlight until you like what you see.

It's a lot of experimenting and different everytime with each different picture I find so it's a bit hard to explain. But that flow should get you started.

Quote:
Originally Posted by Ross G View Post
Great shot Marc.

Such depth, it looks 3D.


Ross.
Thanks Ross. I might do a stereoscopic version when it's finished actualy. Good idea.

Quote:
Originally Posted by TrevorW View Post
Nicely done Marc
Thank you Trev.

Quote:
Originally Posted by strongmanmike View Post
Coming along nicely Marc...don't recognise the field though ..is it upside down..?

Marathon imaging there mate, well done

Mike
Thanks Mike. Possibly but not mirrored.

Last edited by multiweb; 29-05-2011 at 10:56 PM. Reason: spelling
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