I asked 3 weeks ago about getting white out of spot metering something
white; I reminder below:
On Fri, 5 Aug 2005, Godfrey DiGiorgi wrote:
On Aug 5, 2005, at 2:52 AM, Kostas Kavoussanakis wrote:
- The rule of thumb says that, in order to get a very snowy picture to
look white, you add +2 to whatever the (say, CW) meter says.
Will the +2 correction work with a white flower on a macro (ie
mostly white) shot?
Rules of thumb are approximations. It all depends where you want to place
Zone IX ... Zone IX being defined as the brightest part of the scene that you
want to retain detail in.
- How many stops between 18% gray and pure white? Is it 2, as per the
rule of thumb?
18% reflectance gray is Zone V. So if the flower is to be Zone IX, it's three
stops brighter than Zone V.
And here is the result:
http://www.epcc.ed.ac.uk/~kavousan/Orchid.jpg
Z1-P, Tamron 90/2.8 SP, Superia 400, handheld. Spotmetered on the
petal with EV+2.
Many thanks!
Kostas
