On 11/8/2010 8:28 AM, Thibouille wrote:
I think (for what I understand on the subject) that it is exactly
something impossible to demonstrate: the print would be unable to
prove anything. What DR allows (and 14bit is just a way to package the
infos without throwing away part of it) for is to have more exposure
latitude. Think of it as making positive film vs. neg film.
Neg film is forgiving unless you really screw it up and you can
correct for it when 'printing' (lab). The positive is not forgiving at
all AND you can't correct it.
A RAW with low DR is somehow like a positive film, you can't do much
with it in term of exposure corrections: blown highlights are blown
and will stay blown,and dark parts will stay o because recovering them
will only add noise and nothing else interesting.
Thibs, this is what I am struggling with (among other my struggles). It
is not the same as it was with negative film - it could sustain good
degree of pushing or pulling (over or under exposure) and still yield
good image.
So, well, in theory 14 bit is better than 12 bit and 14.1 Ev of DR are
better than 10.5 Ev of DR. However, moving from K10D to K-7 my
photographic process hasn't really changed and the prints and the web
images and the book images still look good. I am not saying that K-5 is
less advanced than K-7. However I am trying to see if /I really need/
that advantage. So far I haven't been convinced that I do.
When K-7 came out, it offered the things that I knew I /might/ use -
faster shutter, full viewfinder coverage, smaller body, revised AF. K-7
offered improvements as a camera body compared to K10D. Later on I
learned that great deal of these improvements went by me unnoticed, but
at least it was something I could comprehend. K-5 does not offer many
improvements over K-7 in that department. If offers few, such as yet
another round of AF improvements, but they are minor compared to the
sensor upgrade.
Taking it back to car analogy - my car with its 125 HP motor is
competent and I am competent (regular street/highway) driver in that
car. Will 'upgrading' to GTI version of similar car be of any use for
me? Well, it will make me feel better, you know like - "I own K-5, this
is the best APS-C sensor ever, you can commit trying to bite your elbows
(*), you inferior Nikon/Canon/Sony being". But beside that - will it
help me in any way? In case of my car I know for the fact that it is not
going to be of any use, all these additional HPs of GTI motor. I much
rather my car had 4x4 drive-train, but that in a sense would be going
from APS-C to FF, whereas again there I will not extract all the
potential thereof, just drive off-road half a dozen times a year when I
feel like going outdoors outtown...
Boris
(*) "The elbow is close, but you cannot bite it" - old Russian proverb
loosely translated by me here for you.
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