Hi,
From what we hear around here (and also on photo.net), you might be happy
with the Kenko Pro-300 1.4 TC.
This will give you 420mm, which is not too bad for birds.
I have the 100-400/4.5-5.6L IS and I use it with the new Canon 1.4 TC for
birds, which gives me 560mm, and I sometimes wish I had the 2x TC (800mm),
but then quality would suffer.
Pierre
At 12:27 5/24/2001 -0400, you wrote:
>I recently got the Canon 100-300 f5.6 L EF lens and after taking it out to a
>nature reserve realized that the focal length is still too short for birds
>and small animals unless they are tame and come to bird feeders etc. I would
>love to get a 1.4 or 2x teleconverter, but I understand that they will not
>work with this lens because of a protrusion on the teleconverter. I was told
>that I could get a 12mm extension tube and then add the teleconverter, but
>that then you lose infinity focus.
>
>Are there any other tricks one can use to use the Canon teleconverter and
>maintain infinity focus. What about other quality teleconverters...can they
>be used with this lens and still maintain autofocus and metering. If so,
>could someone recommend one that will work and still give very good results.
>
>Thanks.
>
>Howard
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