F. Craig Callahan wrote:
>
> It will be interesting to see if any one person on the list has actual
> first-hand experience with all these combinations.
>
> IMO the short answer is no. *Others will disagree,* but my guesses for a
> "sharpness ranking" would be as follows, first to worst:
Same here ...
> EF 400/5.6L (don't know anything about the Sigma 400/5.6 HSM)
> 300/4L + EF 1.4x extender
> 200/2.8L + EF 2x extender
> 100-400/4.5~5.6L IS
> 70-200/2.8L + EF 2x extender
>
> I could be persuaded to reverse the last two. :-)
I'd expect the 100-400 IS to perform better than the 200+TC combo.
Thomas Bantel
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