Word of caution re target exposure.
Usually folks expose white close to clipping. That is not right because the
clipping point may be on a non-linear portion of the sensor characteristic
curve. From my practice, if the raw histogram of clipping is of type shown on
fig.8 of
http://www.rawdigger.com/howtouse/rawdigger-histograms-overexposure-shapes one
needs to keep the whitest patch -0.5 EV from clipping. For those that are on
fig.9, fig 12, -0.5 EV may work, but for those like on figure 19 - either set
ISO 1 stop higher, or set the white to -1EV.
On Jun 12, 2015, at 2:06 PM, Elle Stone wrote:
On 06/12/2015 01:33 PM, Ben Goren wrote:
First, I think you could benefit from a bit of background theory. TheThat's a *very* nice article.
following link is excessively long and there're some bits in there (such as
how to evenly light a target) that should get edited out and I'm working
right now on a much superior method of generating profiles and and and...but
the basic theory is sound.
http://trumpetpower.com/photos/Exposure
I posted a relatively simple "how to" that allows to white balance and
correct exposure on the target chart, that might be useful:
http://ninedegreesbelow.com/photography/well-behaved-camera-profile.html
Elle
