Re: FA 50/1.4 discontinued in Canada

[mike wilson]

John Francis wrote:

On Thu, Aug 18, 2005 at 08:42:39AM +0200, Lucas Rijnders wrote:
Constant aperture zooms are always fast(ish), at least at one end.


Surely the whole point of constant-aperture zooms is that they are
equally fast at both ends of the zoom range, not just at one end?



No, the whole point is that the aperture does not change throughout the 
zoom range.  I'm not sure but I think a non-constant zoom could be 
designed that was of equal (equivalent?) speed at both ends.

m