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You can make a blue sky even more blue and enhance other colors in your photographs in a couple of ways. I prefer using the color controls in Lightroom or Camera RAW but not the saturation sliders. Instead, and especially for the blue sky enhancements, I use the luminosity slider. Subtracting luminosity makes the blue more pronounced without looking unreal. If a universal change affects other parts of the photograph I can open it in photoshop and isolate the sky by selecting and masking or loading the original and the altered photo in layers and masking to show only the altered parts I want.

before and after the sky was altered
before and after I lowered the blue luminosity

 
 
 

Resolution, chapter 2: If a client asks about the resolution of the images I'm shooting I have to say my images are "unresolved". I shoot digital negatives that have dimensions and size. They don't have a resolution until I develop them as JPEG or .PNG or anything else the client may want. The composite below shows meta data of a finished JPEG, left, and the original digital negative, DNG, right. Note the absence of a resolution in the DNG meta data. The JPEG has a resolution because it has dimensions in inches.


JPEG and DNG images from New Orleans convention photographer, Dan Milham
The JPEG has an extra line of meta data.
 
 
 
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