Does any one remember when the new AC refrigerant came out, you had to have
your entire AC system replaced if you wanted to use it ( which was mandated
by the gov.), the molecules where so small they would leak through the
existing hose the compressor would/could not pump it for the same reason,
they where selling systems right and left, that is what all of the
manufacturers information, internet information every thing you could get
your hands on said the same thing, now you can go to wall mart buy a little,
what is it $20.00 kit and do it your self, use your old system just replace
the hook ups to the new and improved size, suck out the old and put in the
new and guess what no leaks, and no compressor problems! and yes I know from
experience, I did it to my 1984 corvette 2 years ago and it is still cooling
just fine.
Terry L. Mair
Mair's Photography
158 South 580 East
Midway, Utah 84049
435-654-3607
www.mairsphotography.com
----- Original Message -----
From: "Jeff Spirer" <jeff@xxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, October 12, 2005 1:54 PM
Subject: Re: ExpoDisc: Overpriced gadget for suckers?
The article shows it very clearly in the process diagram. The author is,
as I said before, an optics professional and understands digital camera
operation at a level few people outside the manufacturers do. I would
take his word over a newsstand magazine any day of the week.
A few more references:
http://www.dpreview.com/reviews/canond30/page14.asp
http://luminous-landscape.com/reviews/software/camera-raw.shtml
http://www.creativepro.com/story/review/19008.html
http://www.jirvana.com/shutterbug/Aug_002_raw_deal.pdf
This is really basic information, there's no controversy around it. RAW
is RAW. It has nothing applied to it, no white balance, no contrast, no
anything but exposure. That's why it's called RAW. White balance MUST be
applied after downloading the RAW file since there is no white balance
applied to a RAW file in the camera. The image file does carry header
information about the white balance setting in the camera, but it's just
header information and used by most RAW converters as a starting point.
However, the file itself is completely unaffected by the WB setting.
Once again, this is basic to the nature of a RAW file. Any decent
reference on what a RAW file is explains this.
At 12:34 PM 10/12/2005, Terry wrote:
This article never in any way said weather a white balance had an effect
or not on the RAW file, however there was an article in, I believe it was
Digital photo pro magazine which did say that the white balance that was
chosen did have an effect on the RAW file and showed examples of how this
is good and bad for the conversion, so now I guess we need to decide which
article to trust one which did not take a side or the other which did, for
me I will continue to do custom white balances on all of my RAW files when
I shoot them.
Terry L. Mair
Mair's Photography
158 South 580 East
Midway, Utah 84049
435-654-3607
www.mairsphotography.com
----- Original Message ----- From: "Jeff Spirer" <jeff@xxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, October 12, 2005 10:42 AM
Subject: Re: ExpoDisc: Overpriced gadget for suckers?
This isn't something there is any question about it. There's an article
about an optics engineer and photographer here:
http://www.photo.net/learn/raw/
that shows how it works. There's a hundred other places to get the same
information. RAW comes off the sensor without any settings applied.
That means white balance settings don't matter.
At 08:20 AM 10/12/2005, Terry wrote:
All I can say is look it up or better yet try it your self!
Terry L. Mair
Mair's Photography
158 South 580 East
Midway, Utah 84049
435-654-3607
www.mairsphotography.com
----- Original Message ----- From: "Jeff Spirer" <jeff@xxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, October 12, 2005 8:43 AM
Subject: Re: ExpoDisc: Overpriced gadget for suckers?
This is incorrect. White balance is applied by the camera only when
creating a jpg. The RAW data is unaffected by the white balance
setting, which becomes simply header information for the converter.
At 07:09 AM 10/12/2005, Terry wrote:
I guess what I am trying to explain is that lets say you take two
pictures exactly the same except you use different white balances'
when you create them you will not necessarily get the same result
using the raw file converter to "Fix" the white balance weather you
have a properly exposed file or not.
Jeff Spirer
Photos: http://www.spirer.com
One People: http://www.onepeople.com/
Surfaces and Marks: http://www.withoutgrass.com
Jeff Spirer
Photos: http://www.spirer.com
One People: http://www.onepeople.com/
Surfaces and Marks: http://www.withoutgrass.com
Jeff Spirer
Photos: http://www.spirer.com
One People: http://www.onepeople.com/
Surfaces and Marks: http://www.withoutgrass.com
