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10D, canon 400mm F5.6L & tamron teleconvertor
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November 20th 04, 01:15 PM
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In message ,
wrote:
Kibo informs me that "Don" stated that:
Folks
I have been trying to use the Tamron SP AF TeleConvertor 300F-CA 2X with my
400 F5.6 L series lens but the results are dismal. I obviously was aware I
would have to manual focus but I haven't been able to get a sharp shot or
even a keeper for that matter yet. Any one has any ideas or similar
experience or would care to comment and assist me if I am doing something
wrong. I have tried from F11 to F14 on tripod etc.
I also have a 10D, & I've found it impossible to get a good manual focus
in general, due to fuzziness of the & lack of focussing aids on the
viewfinder. I'm guessing that you're running into the same problem.
Whenever tuning anything where the ideal position doesn't snap and
sparkle, I find the best approach is to feel the amount of rotation (or
# of clicks) from where it gets noticeably bad in each direction, and
then rotate (or click) half that much back towards the middle. I do
this for tracking VCRs, tuning radios, manual focusing, etc.
--
John P Sheehy
[email protected]