On 10 Aug 2004 at 9:54, John C.  O'Connell wrote:

> I never said there was anything "wrong" with the design,
> it's just that AT THE SPECIFIC magnification the older
> designs were designed for, the pseudo-zooms are going
> to hard time matching the classic fixed designs, the
> extra elements needed for faster speed and wider focus
> range become a burden rather than help in terms of contrast,
> saturation, and flare reduction just like a prime is better
> at one focal length than a zoom at the same focal length.
> Except in this case you are comparing a FAST ZOOM to a Slower
> prime. Guess which one is almost always going to be better
> if you use the prime for what it was designed for?

We've engaged in this debate a few times here but I've never seen any proof of 
the claims. Lens design has come a long way in 30 years, surely they have made 
some headway in performance? Unfortunately I don't have any old lenses and I 
suspect you don't have any new ones, so does anyone have both and are willing 
to execute some rudimentary tests?


Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications/
Pentax user since 1986, PDMLer since 1998

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