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? Say at 11x16.
Also, how noticeable do you think that extra 20mm in the 300/1.4TC
combo would be? I'm trying to visualize a 5% increase in focal length
at 400mm - maybe not that much, eh?
If these are all optically comparable, then at least I can just think
about my usage, and the relativ felxibility of the various set-ups.
Or is telephoto month over? ;-)
Ken Durling
Website http://home.earthlink.net/~kdurling/
Alternate e-mail: [EMAIL PROTECTED]
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