From: "Ken Durling" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Sunday, February 18, 2007 11:58 PM
Subject: EOS 30D blues
I just ran a test to confirm it - same scene, shot in all modes, all at
f/8, on two different lenses - EF 50/1.4 and 28-135 IS. The 28-135 is a
more saturated-looking lens overall, but the landscape mode shots show the
same increase.
Ken
Ken, can't offer any suggestion about the landscape mode, I avoid using
any of these 'modes' as they offer nothing that I can not do with the
camera myself (and I find them distracting)
I can however say that I had some difficulties with my 20D finding that
my EF24 f2.8, EF50 f1.8 series I, EF18-55 and TS-E 24 all gave different
exposures in a test I did (while looking for resolution differences)
using the camera on manual and same settings across all exposures.
nothing major, only about .5 stop or so
I have not seen this with simmilar exposures with chromes on the light
box using my trusty old EOS630 body when doing simmilar tests (on
Kodachrome)
it doesn't really bother me, it just is.
I did (also) see significant exposure differences when shifting the TS-E
which I put down to an effect of the 'micro lens' design on the sensor.
http://home.people.net.au/~cjeastwd/lensTesting/
which did bother me
cjeastwd, I assume you did this test of a flat, evenly lit surface.
The exposures will almost certainly be different, and I would suspect
the 50/1.8 gave the most exposure, and the 18-55 the least (darkest),
with the 24's somewhere in between. It's part of the effect of
different optical/mechanical constructions.
As for the 24TSE, this is to be expected, and you're probably right
in assuming it's due to the lenses/photosite wells. I don't use the
24TSE on the 20D as I almost always need a wider view, so reserve it
for the full frame cameras. But if I'm going to the trouble of using
the TSE, I don't have any problem in doing a test esposure first, so
the exposure variation is of no consequence to me.
--
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:[EMAIL PROTECTED]
|[ ]| http://www.archiphoto.com
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