Hi,
Thanks for the replies.
What I meant to ask in the original post is that yes
I'll be composing the shot similarly, but in one case
I'll be using a 50mm f1.4 with TC and another case
without. Of course, with the TC the lens is
effectively 100mm f2.8, although the lens is wide
opened at f1.4. Am I right here?
My impression of a TC (I don't know if I'm right), is
that it takes the middle portion of the image formed
by whatever lens it's attached to, and magnifies that
portion. The f-stops drop in light is due to the lens
opening being further away now that it would have
been. It sounds a little too silly and simple for
something consisting of 7 elements, but I don't think
it should get more complicated than this.
That being the case, wouldn't the "100mm f2.8" lens
have the same DOF as the original 50mm f1.4?
Puzzled,
Kelvin
--- Leon Altoff <[EMAIL PROTECTED]> wrote:
> Only if the framing was the same. Which would mean
> that with the 100mm
> you would be further away from the subject than with
> the 50mm to get
> the framing the same.
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