Re: Exposure

[Caveman]

The problem is that he's claiming he gets a Something that he's not 
defining what it is. I may claim that I can get the "trusty exposure" 
anytime all day long 100% accurate. Can you argue with that without me 
defining what a "trusty exposure" would be ? And of course, I may also 
claim that it's something you never got and will never be able to. And 
you still can't argue.

cheers,
caveman
J. C. O'Connell wrote:
the problem is that he is making these claims
on cameras using TTL metering (open aperture)
that assume the selected f-stop and shutter
speed combination is not only perfect, but
also that changing the speed and aperture settings
to what is theoretically the equivalent exposure
is also perfect even though a DIFFERENT
compensation may needed from the first one.
The meter cant be right for both but it indicates
the same.
JCO

-----Original Message-----
From: Mike Ignatiev [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 11, 2003 4:45 PM
To: [EMAIL PROTECTED]
Cc: J. C. O'Connell
Subject: Re[2]: Exposure 

So make a table:
Lens | Shutter Speed  |  Aperture | Compensation
-------------------------------------------------
    |                |           |
What's the big deal? I was not saying it's not random. That is 
irrelevant. What matters is that it's reproducible to withing 
your tolerances. 

If your cammera gives you random shutter speeds at the same 
position of the dial, or the same lens has different aperture 
openings at the same aperture setting (over the tolerances) -- 
that means the equipment is junk.

Mishka

-----Original Message-----
From: "J. C. O'Connell" <[EMAIL PROTECTED]>
To: "Mike Ignatiev" <[EMAIL PROTECTED]>,<[EMAIL PROTECTED]>
Date: Wed, 11 Jun 2003 16:02:13 -0400
Subject: RE: Exposure 


shutter speed and aperture variations are random from
stop to stop and speed to speed. There is no way
to "calibrate" them out of the system. Especially if
youre using different lenses which may not match
each other stop for stop.
JCO