the putative difference is better rear coatings and possibly a redesigned
rear group to make the rear element less flat, but that is supposed to
depend on the lens. i have never had that kind of problem with any lens i
currently own on my *istD.
Herb....
----- Original Message -----
From: "John Whittingham" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, June 20, 2005 10:03 AM
Subject: Re: Sigma 105/2.8 EX macro - how good?
It was pointed out to me a short time ago that there is very little
difference in the Sigma EX macro lenses and the DG equivalents, IIRC it
was
Mark Roberts. Indeed the 50mm f/2.8 has almost identical spec to the
earlier
EX lens, maybe a slightly different coating on the rear element but I
doubt
it, I'll let you draw your own conclusions to that.
