RE: Great Fun Last Night

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Daniel McCauley" <dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>


Nice Image!

BTW, the "Hack" firmware ISO 3200 implementation really doesn't do anything
at all to the image.  This "hack" which is identical to the same ISO 3200
functionality as the 20D, etc..., simply uses the software to incorporate a
bitshift of each pixel's data, as opposed to changing the gain of the output
amplifiers on the CMOS chip.  So in fact, you are actually LOSING data when
you use ISO 3200.

Stick with the ISO 1600 instead.  You can get the same results, without
losing data, by adjusting the curves in photoshop.

Remember that with digital cameras, that the amount of information or
sensitivity of the camera remains EXACTLY THE SAME no matter what the ISO
setting.  The only change is the way the data is mapped out digitally.
Ideally, you would want an ISO of around 1000 to have a one-to-one mapping
of pixel value to digital bit format, but since we don't have ISO 1000, we
stick to ISO 800 or ISO 1600 instead.

Dan



-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Monday, August 21, 2006 4:06 PM
To: tesla@xxxxxxxxxx
Subject: RE: Great Fun Last Night

Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>

Cameron,

The camera is a Canon Digital Rebel with the "Hack"
firmware loaded to enable the ISO 3200 capability.

I had the camera do an "auto focus" with outdoor
lights on, and then switched it to manual focus to
hold the setting.

I set the camera on Manual and adjusted the exposure
for ambient light, and then purposly set it on the
dark side with the expectation that the added light
from the coil running would comphensate. The exposure
was somewhere between 2.5 - 3 seconds as I recall.

The camera was on a tripod and I asked a friend of
mine to just snap as many pictures as possible.  I got
about 60 in the course of the night.

Curt.


--- Tesla list <tesla@xxxxxxxxxx> wrote:

 > Original poster: "Cameron B. Prince"
 > <cplists@xxxxxxxxxx>
 >
 > Hi Kurt,
 >
 > As others have stated, this is a really sharp
 > picture. Can you tell us what
 > type of camera it is and any custom settings you
 > used such as aperture,
 > shutter speed and exposure?
 >
 > Thanks,
 > Cameron
 >
 >  > -----Original Message-----
 >  > From: Tesla list [mailto:tesla@xxxxxxxxxx]
 >  > Sent: Sunday, August 20, 2006 8:22 PM
 >  > To: tesla@xxxxxxxxxx
 >  > Subject: Great Fun Last Night
 >  >
 >  > Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>
 >  >
 >  > I just couldn't stop myself from posting a
 > picture from last night...
 >  >
 >  > http://www.wackorama.com/tesla/bigtesla.jpg
 >  >
 >  > Greater than 7' Streamers with 22A input.
 >  >
 >  > Curt.
 >  >
 >
 >
 >