[AG-TECH] Lights, camera, question

Art Ziarko aziarko at insors.com
Fri Sep 7 13:06:38 CDT 2001

There are a few things you can still try. The Sony cameras have a backlight
feature you can use but with Sony it's either on or off. The Canon VC-C4 is
a much smaller camera with a better zoom  power and has on the fly
brightness adjustments from the remote. You can also make adjustments to
picture quality in VIC (Contrast,Brightness,Hue,Saturation).
Full Spectrum fluorescents bulbs can be used at $4-$5 each they remove the
yellowing you get from standard cheap bulbs. If you are zooming out that far
what about adding a wide angle lens to the camera.
What distance are the projectors from the wall and the lumens rating?

----- Original Message -----
From: "David Minor" <dminor at salud.unm.edu>
To: <ag-tech at mcs.anl.gov>
Sent: Friday, September 07, 2001 12:10 PM
Subject: [AG-TECH] Lights, camera, question

> So we're doing some final prep work on our room, and  I wanted to buzz a
few questions to people to get their opinions and experiences.
> Initially the room was pretty standard, with white walls and overhead
flourescents. This caused some issues with our cameras (Sony Pan and Tilts),
namely that the cameras "saw" a lot of the white walls and tried to
compensate, causing people's faces and clothes to be shaded oddly (usually
too dark).
> On the advice of several people we painted our walls a darker color - sort
of a plum shade. This seems to help tremendously. We also had a lighting
expert come in and spec new lights. His recommendation was to install much
higher speed flourescents, and have them installed at an angle facing away
from the projection screen. This we have done and it also helped the room
> But - we are still less than pleased with our results - especially
comparing it to how some of the other rooms out there look. Our primary
problem is that when zoomed out as wide as possible (to see all audience
members) the image quality is pretty bad - the whites and light colors
especially are way too overpowering (most people's faces are washed out for
> So, to my question: what are people's thoughts about lighting in rooms? Is
it something that they have worked on or changed and what have been the
results. Alternatively, what about cameras? Is anyone using anything else
that they think works better? Are we bumping up against the limitation of
the optics or could it be soomething else?
> Thanks in advance for any input!
> david.

More information about the ag-tech mailing list