On 9/8/2011 9:57 PM, Jim Nichols wrote:
> Moose,
>
> As I said, I am experimenting. A friend on the LUG asked me for the RAW
> image of the first one, and he could do no better than I did with it. He
> suggested I look at +.3, so I put it up in the gallery because that was the
> only way I could read all of the exif data. I agree, from my simple
> experiments, "zero" begins to look better and better.
>
> I am confused by your definition of ETTR. I thought that the purpose was to
> bias the histogram to the right because that allowed more pixels to be used
> in the shadow area.
Nope, as is so easy with stuff tossed about on the web, you've got it
backwards. If you had read the Luminous Landscape
article Chuck posted a link to, which is where the terminology started, you
probably would have it correct.
ETTR started as people, especially pros and advanced amateurs just starting to
use the first competent, affordable
DSLRs, were learning the real differences between film and digital. The idea is
that digital has two problems (both of
which were worse back then):
1. Over expose just a little and the highlights blow. Well, that's not so
different from slide film, we're used to that,
so just underexpose enough to be sure.
2. Unlike slide film, though, digital gets all noisy, sometimes downright
blotchy and ugly, in underexposed medium and
deep shadows. Film lost tonal detail, but did so just by getting darker, not
ugly.
The answer proposed was to use histograms, a new to most camera tool, to get
the exposure to just kiss the right side,
the highest possible exposure, for best shadows, without clipping the
highlights. It's called expose to the right
because you are only paying attention to the right side of the histogram,
letting the left fall where it may.
As with John Hudson's suggestions that there is a better acronym and my
comments on RAW-raw, there's no sense in arguing
whether ETTR is a good acronym or not, it's entered the lexicon with a specific
meaning.
> ...
> Is there a simple way to read the exif data in the RAW converter? All I get
> is ISO, shutter speed, and aperture. EV is not shown in my software.
Nope, seems ACR doesn't do that. PSE doesn't? Wait, yes it does.
I found this without looking very far, "in the *PSE7 Editor*, there's a
possibility to see the current image EXIF data:
*File=>File Info* and then */Camera Data 1/* or */Advanced /*(EXIF Properties)"
The only PSE I have is an old PSE2 on a laptop used now for other things.
File=>File Info works on it. It doesn't show
EV adjustments, but later versions of PSE may.
What do you use for looking through images to open in PSE? FastStone is what I
use, set so it opens RAW files into
ACR=>Photoshop. Hitting the 'i' key pops up a window with EXIF data, including
EV. When viewing images full screen,
running the mouse over to the right edge of the screen does the same thing.
The best, most through, EXIF viewer, also free, is exiftoolGUI. It shows things
others don't. But what you are looking
for now is basic.
Moose
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|