Re: Exposure

[mishka]

J. C. O'Connell wrote:

He's claiming to be able to do
it without any type of compensation
for the settings or lenses actually
used. His equipment is 100% perfect
according to him.
no argument here. but Pal have tendency to exaggerate things, to put it 
mildly.

In your example below, you did not
take into account that metered
value may read the same at some
later date, but the exposure needed
is totally different because the meter
doesnt take reflectance into account.
It would only work if the image remained
the same too.
i do not think so, not if the meter is linear. i mean, if the lens
true aperture is not f/8, but f/9, it will be so regardless of the light 
level and reflectance.
the same goes for shutter speed.
once you know the compensation for this kinds of errors, you can meter 
the scene with a spot meter
(TTL) and do the zone Ansel Adams thing, or a greycard with any other 
kind of TTL meter, if you
have one handy. the exposure would be different, sure. but the 
compensation for the meter reading
better be the same.

best,
Mishka