imagemeister wrote:
Pictures aside, Here are the Photozone test scores for the 1-4 and 400 prime on APS C at 8 MP: 1-4 @ 400 f5.6 (1670) center, (1592) edge, 400 prime @f5.6 (1657 ) center, (1655 ) edge . So, the 1-4 "wins" in the center but "looses" at the edge. This difference is so small as to be indiscernable by most mortals ! So, in my opinion it comes down to ergonomics and speed of use.
At worst, they seem very similar as you present the information from Photozone. Have you reviewed the comparison by Michael Reichmann? His side-by-side test would seem to be in conflict with these numbers. It would be interesting to see his response. Oh, that's right, he already responded. He said there was nothing wrong with either his 100-400 or his testing process. Oh well. I guess there's no way to settle this one. I think I'll probably quit talking about it. Thanks for the numbers. :-)