> -----Original Message-----
> From: Andre Langevin [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, January 21, 2003 7:44 PM
> To: [EMAIL PROTECTED]
> Subject: RE: Vivitar 35-85 better than Pentax 24-90?
>
>
> >Isnt the viv 35-85 a varifocal ( not a true zoom)lens?
> >If so that combined with the narrower range could account
> >for it's better performance.
> >JCO
>
> Maybe. But are all zooms varifocal lenses that have their focus
> adjusted automatically by another "cam" inside the lens? In other
> words, was a zoom made as a varifocal lens because it was easier to
> build it this way. Imagine the 35-85 with another internal metal
> barrel to change focus automatically.
>
> Andre
> --
>
Nope varifocal lenses are much simpler optically as well
as mechanically. Less elements for the same amount of
correction means more contrast/resolution. The vivitar
series 1 varifocal lenses were made that way for maximum image
quality, not to save costs, they were MORE expensive than
similar true zooms of the time they were made.
JCO
