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Thread started 07 Nov 2007 (Wednesday) 12:55
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how do you do bright & vibrant blue sky

 
psxindo
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Nov 07, 2007 12:55 |  #1

I saw alot of pictures here where the sky is very bright and vibrant in blue...
everytime I take a shot of the sky, it would come out to be muddy blue...
I would guess to be in the PP...
Because I did try taking the picture different way, expose for the sky and even underexposed the sky by 2/3 to 1 stop... but everytime the blue sky is very muddy looking not vibrance...
software that I'm using is CS2 and lightroom

thanks


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Mike-DT6
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Nov 07, 2007 13:59 |  #2

If you aren't using a polarizing filter, then you could try one of those to improve things a bit.

Mike

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tonylong
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Nov 07, 2007 14:35 |  #3

If you try to expose for the sky, the camera will actually underexpose. The camera is programmed to expose for "medium". This means that if you meter the camera to something light-toned, the camera will "think" that it is medium-toned and will set the exposure too low.

So, if you want to expose for the sky, meter the sky and then tell the camera that this is a light tone by either upping your exposure compensation or dialing it up in manual mode.

Think of snow as being maybe +2 stops, and figure it from there.

Polarizers and graduated neutral density filters can help to tone down the sky's "brightness" (allowing more "blueness") and can be used with the following method to get good saturation.

Hope this helps some!


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cdifoto
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Nov 07, 2007 14:36 |  #4

I use Lightroom and boost the blue and aqua channels, then increase the vibrance and saturation a tad. Having a reasonably blue sky in the first place helps since you can't boost what isn't there. Some folks will do a merge with multiple exposures. I'm too lazy for that.


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psxindo
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Nov 07, 2007 15:34 |  #5

cdifoto wrote in post #4271822 (external link)
I use Lightroom and boost the blue and aqua channels, then increase the vibrance and saturation a tad. Having a reasonably blue sky in the first place helps since you can't boost what isn't there. Some folks will do a merge with multiple exposures. I'm too lazy for that.


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thanks, this is what I was after...
maybe the problem I had was that I was taking a picture on the beach with the subject wearing blue jeans...
when I increase the blue and aqua, vibrance and saturation, then the jeans would end up way too bright...


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cdifoto
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Nov 07, 2007 15:47 |  #6

Yeah you really have to watch for that. Unfortunately LR doesn't support masking. Hopefully it will someday soon. Until then, ease up on the blue and take what you can get I guess. Using a polarizer would help (although I don't use any filters) so you don't have to crank the blue as much.


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cdifoto
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Nov 07, 2007 16:03 |  #7

One thing you can do, by the way, is jack up your vibrance in LR, then go to Photoshop and mask off the jeans and de-saturate those to look normal again. Kind of a pain in the butt if you're after super-quick results, but it's a workaround and really wouldn't take that long on a single image.


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lukasgunar
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Nov 07, 2007 16:12 |  #8

psxindo wrote in post #4271077 (external link)
I saw alot of pictures here where the sky is very bright and vibrant in blue...
everytime I take a shot of the sky, it would come out to be muddy blue...
I would guess to be in the PP...
Because I did try taking the picture different way, expose for the sky and even underexposed the sky by 2/3 to 1 stop... but everytime the blue sky is very muddy looking not vibrance...
software that I'm using is CS2 and lightroom

thanks

Hello psxindo,
here's my way of adjusting sky in CS2.
Go to Image-->Adjustments-->Selective Color. Choose Blues under Colors drop-down menu and move the Black slider to the right - up to 90 or more %. The benefit of this method is that you can see the changes directly on your picture.
Once you do this, I would suggest to the very slight S curve under Image-->Adjustments-->Curves which will boost contrast and will help to the sky. If needed you can slightly improve Saturation under Image-->Adjustments-->Hue/Saturation.

This is what I've done on picture below.
Please let me know if this method worked for you and if the sky on my picture is your desired one.
thanks and good luck.

lukas

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tonylong
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Nov 07, 2007 16:18 |  #9

In LR you can quickly up the saturation of the sky by going to the HSL tab and clicking the little tool icon on the upper left corner, then click-and-drag up on part of the sky. If you go too far you can get muddled results where there is tone changes, like near the horizon, but what it does is raise the levels on the mix of colors -- you can see that if you look at the sliders in the panels.

Of course, those blue jeans will still look bluer...


Tony
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UncleDoug
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Nov 07, 2007 16:41 as a reply to  @ tonylong's post |  #10

lukas,

That is what I do.
But I also add black to cyan as well.
I'll also pull red and yellow from blue and cyan as well.
Helps to purify the blues.

As a side note, I'd say 7 out of 10 digital images that I'm tasked with adjusting at our shop need this treatment to blue skies. I think it has allot to do with improper white balance or improper color temperature. Could also be the fact that sensors do have trouble with deep blues.


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how do you do bright & vibrant blue sky
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