GRAY SCALE
When a color temperature of 6500K is selected, the LS-5 is very close out of the box. Still, with
proper equipment and technique, it can be coaxed to near perfection. Not all DLP machines are
so polite. It is a tribute to the design team that with only a 2-point adjustment (color balance can
only be adjusted at one place for high luminance and one other for low luminance - some new
displays can be adjusted at 11 places from absolute black to peak white) the gray scale was able
to be adjusted ruler-flat throughout the spectrum. In some sets, 11-point color balance adjustment
is REQUIRED to mask "lumpy" gamma. Kudos, Runco.
CONTRAST RATIO
Here we go again. Everyone's looking for Mr. Big Number here.
So this is where my contrarian side jumps up. I have long been underwhelmed by the C.R.
measurement know as full-on, full-off (a.k.a., full-field). Indeed, it IS a measure of a device's
ability to project light (or not) at the extremes, and all manner of stops are pulled out to achieve
the biggest number possible. My argument is that it has little to do with anything you will see at
any instant in time on your screen. As Joel Silver often cautions in ISF class, "Some
cinematographers actually have the audacity to place a white object next to a black one in the
same frame". Yep, they do. Still, for the record, I did measure a full-field C.R at about 12,400:1
in my less-than-optimum environment for this kind of metric. Those who are enamored with 5 or
6 digit numbers should be reminded that the ratio is heavily influenced by the denominator,
absolute black which is often a "1" out in the fourth decimal place - which is a fraction of the
best measurement instruments accuracy spec!
I much prefer the checkerboard method (a.k.a., modified ANSI) which takes into account such
detractors as lens scatter, screen anomalies and room reflections - in other words, it is much like
what you would experience watching an actual movie in your theatre. It is an excellent way to
compare two projectors (or any displays) in the same test environment. This form of C.R.
measurement yielded 288:1 which, believe it or not, is a very good for ANY projector at ANY
price point. If I had opted for a smaller image size and used the "eco" lamp setting, I probably
could have got an even larger number, but then if I had been born of different parents, I could
have been the King of England!
GAMMA
Gamma selections can be stepped through on the remote or selected from the "Advanced" menu
tab. There are 5 choices although you are likely to only be concerned with 2.0, 2.2 or 2.5. After
calibrating the gray scale, I measured actual gamma to be 2.4 on the projector's 2.5 setting and
(110 pages)
(1 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commentaires sur ces manuels