On Fri, 12 Mar 1999 20:37:42 +1300 "Goldberg, Ross P." <[EMAIL PROTECTED]>
wrote:
>First question: Are these 62mm? I'm assuming so since the 70-300 is, but
>want to be sure.
I don't know what you mean here. Teleconverters don't have filter threads (at
lest my 3rd party ones don't).
>Which one is probably the best candidate? Between the 14A and 201, I'm
>leaning towards the 14A, as I'm concerned that not only would 2 stops of
>loss be killer on 5.6 (yes, I know none of them will AF on this lens at
>300), but a focal length of 600 will require a shutter speed > 500ms (for a
>hand-held attempt), for the equivalent loss of a 3rd stop (double the speed
>requirement). So 5.6 at 2000ms would now be 11 at 1000ms in the best-case
>scenario. Doesn't seem very likely.
I don't seem to understand your math. As far as I know 1 second=1000ms. So at
600mm you need 2ms or lower for a shutter speed. But if you are going to
compromise your image with a teleconverter on a zoom, you should probably
consider using a tripod lest you lose even more quality.
