Perspective is quite similar, however the DOF tells which is which. And points
out that comparing them that way only tells part of the story. Which shows what
Wheatfield and I have been trying to say all along.
graywolf
http://www.graywolfphoto.com
"Idiot Proof" <==> "Expert Proof"
-----------------------------------
Dario Bonazza wrote:
To me, they look equivalent. Yes, different color balance, but this
depends on white balance and film in use. Just either a bit more exposed
the 18mm, or some underexposure for the 28mm, depending on the details
you look at. Small difference in AOV, which could also be visible using
two different lenses of the same focal length on the same camera. Same
perspective and same everything, as it should be. Thanks Shel, this
picture is worth a thousand words.
Dario
----- Original Message ----- From: "Shel Belinkoff"
<[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, July 21, 2005 2:17 PM
Subject: Theory of Equivalency
Last week we talked about whether or not an 18mm lens on a Pentax DSLR
and
a 28mm lens on an SLR were equivalent. Saturday my friend and I
tested the
concept. Here are the results. You decide how close the two lenses
are to
being equivalent.
http://home.earthlink.net/~pdml-pics/2818.html
Shel
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