Look at the Tamron 70-300 LD. It's generally considered to be a better
performer than either Sigma (APO or non-APO) in that range. It's also
the same design as the well regarded Nikon 70-300 ED, but the Tamron
does 1:2 macro as well.
Pretty much any 70-300 on the market today is soft at the long end btw.
-Adam
Don Williams wrote:
Thanks Kostas -- I'll take a look at the MTF diagram if I can find one.
Don
Kostas Kavoussanakis wrote:
On Fri, 6 Jan 2006, Don Williams wrote:
The awful chromatic aberration of an very expensive Schneider 360mm
telephoto I had for many years made me very much aware of the
problem. But a few years ago I got a Sigma 5.6/400 APO and the images
are very clean. That was my reasoning.
From what I recall reading here, the Sigma in q needs more than APO to
be used as you go towards its long end.
Kostas
