Tim Munro wrote:
>
> ----- Original Message -----
> From: Skip <[EMAIL PROTECTED]>
> >Pop a 1.4x on the 300 and you have a
> > max aperture of 6.3, which means my A2 won't AF. ......
> > Skip
>
> I don't follow here Skip. 1.4x is one stop loss - so should give you f5.6,
> not 6.3. I disagree with the comments regarding image degradation with TC's
> as I regularly use the EF1.4x on the 300/2.8 IS and 70-200/4 for magazine
> reproduction with good results. The 2x gives a more questionable result and
> I always try to avoid using it.
> Tim
>
>
Sorry about that, bad math!
(Dammit, Jim, I'm a photographer, not a mathematician!)
Skip
PS, the only experience I have with a telextender is with a Vivitar 2x,
very poor.
--
Shadowcatcher Imagery
http://www.shadowcatcherimagery.com
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