Glen wrote:
I'm also tired of all the zooms which don't hold their aperture throughout the zoom range. Is it that difficult or expensive to make a constant-aperture zoom? I seem to remember that once upon a time, that was the typical way of building zoom lenses. If they could do it in "the good old days", then why not now? These days, constant-aperture zooms are rare.
They could sell an f/4-5.6 zoom as a constant f/5.6 zoom just by adding a mechanism to stop down the aperture at shorter focal lengths, but most people would prefer the extra light. Making a *fast* constant-aperture zoom would require an increase in weight, size and price.
Personally, I'm guessing that most of the people who want f/2.8 zooms for their DSLRs have already jumped ship to Canon or Nikon.
S
