----- Original Message ----- From: "John Forbes" <[EMAIL PROTECTED]>
There would be little point in producing a 50-220 f4 when there is already a 50-200 f4-5.6. Nor would such a lens merit the term "high performance".
Huh? Why wouldn't it merit the term high performance? Performance has nothing to do with the speed of the lens. In fact, it is easyer to design a slower high performance lens than a fast one. Many of the "fast" zoom lenses aren't high performance when compared to a prime. Look at the complaints on some of the Canon lenses. I have one really high performance zoom Pentax lens and it's maxium speed is 5.6! It is great at all apertures and all focusing distances and the result is indistinguishable from a good prime.
Pål
