RustyBug
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Upload & Sell: On
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+1 @ EBH & RHPS
RHPS wrote:
Try this http://www.hermitage-ps.co.uk/monitor_luminance.htm
While the article didn't specify the difference between additive and subtractive ... it brought the difference to light (pun intended) for me on this one.
It donned on me that while prior thinking was that by getting your monitor brightness calibrated for the room's luminance level, you should be able to get your prints to match. RATHER, because the monitor is additive and the print is subtractive ... with the room level being constant ... they CANNOT match and NEVER will using the SAME (low) AMBIENT luminance levels for viewing each (particularly with our adaptive vision). 
Thinking back to the use of a light box for chromes and dedicated picture lights mounted above the print/painting on the wall. Now, it makes sense why the angst exists, i.e. the print is absorbing photons, whereas the monitor is making them. It's no different than looking at the sunset (additive) vs. looking at a different subject (subtractive) being illuminated by the SAME overhead sky that exists along with the sunset ... i.e. two very different luminance values.
Crude, but conceptually it's no longer like chasing a ghost for me ... "Got It" ... Thanks. 
Let:
X=Monitor Brightness
Y=Ambient
Z=Reflected Print
If
X>Y (Emitted vs. Ambient)
Y>Z (Product of Absorption)
Then
X>Y>Z
X>Z
Z<X
Bottom line for me on this one is: Understand the need to put the right amount of light on your print to offset the absorption characteristic of the printed media (which varies from rag to metallic anyway).
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