Re: adjusting exposure vs. brightness

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Great stuff. Thanks Howard, and Leah too, for the good question.
I wondered about the difference myself.

Denis
www.Linkedin.com/in/sweeneyd


On Thu, Jul 31, 2008 at 11:50 PM, Howard <howard.leigh111@xxxxxxxxxxxx> wrote:
Looking at the histogram changes in LR when adjusting exposure or brightness seems to show that
Exposure: simply moves ALL data to the right hand end and eventually off the edge and so brighter tones burn out, followed by the rest...
Brightness: moves all data towards the right BUT not past it, so that the brighter tones all squash up on the right hand edge of the histogram but don't actually burn out.
According to Lightroom Help:

/Exposure/
  / Sets the overall image brightness, with a greater effect in the
  high values. Adjust the slider until the photo looks good and the
  whites are at the right level. Use Recovery to bring highlight
  values down. /

  /Exposure values are in increments equivalent to f‑stops. An
  adjustment of +1.00 is similar to increasing the aperture 1 stop.
  Similarly, an adjustment of –1.00 is similar to reducing the
  aperture 1 stop./

/Brightness/

  / Adjusts image brightness, mainly affecting midtones. Set the
  overall tonal scale by setting Exposure, Recovery, and Blacks. Then
  set the overall image brightness. Large brightness adjustments can
  affect shadow or highlight clipping, so you may want to readjust the
  Exposure, Recovery or Blacks slider after adjusting brightness. /

So my workflow here is:
Adjust exposure until required highlight tones are fractionally short of clipping oor clipped
Adjust shadows (blacks) similarly
Adjust brightness to give the correct tone in lighter regions
Adjust shadows to improve shadows appearance (more detail or less as I think appropriate)
Adjust contrast to "correct" level.

Howard


Lea Murphy wrote:
What is the difference between these two?

I usually adjust exposure (often opening) but on a particularly poorly exposed set of images I'm finding that adjusting brightness is working better and easier.

I'm using Lightroom for these adjustments.

Curious to know if one is 'more right' than the other.

Thanks.

Lea

babies. they're what i do.
www.leamurphy.com











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