Ken Durling wrote:
> OK, let me be ask it this way: say one was considering the following,
> and that we are saying there is no visible difference between IS and
> non-IS 300's for ther moment:
>
> 100-400 f/4.5-5.6L IS
> 300 f/4L IS + 1.4 TC = 420/5.6
> 400 f/5.6L
> 200/2.8L + 2xTC = 400/5.6
>
> all of which give you a 400/5.6, and leaving all other considerations
> such as IS aside, will all of these combinations give about the same
> image sharpness/quality?
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The 100-400mm has the 400mm F5.6 but also has the greatest range making it
more versatile than the others.
Peter K
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