PatrickCheung
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The idea that prime lenses are sharper than zoom lenses is no longer a universal truth, like it was 20 years ago when prime lenses were almost always optically better than zoom lenses. Today's modern zoom lenses may be better than prime lens designs that are either significantly older, significantly smaller and lighter, or significantly less expensive.
A good case in point is Nikon's new 14-24 AF-S Nikkor zoom: this lens is a better optical performer than ALMOST ALL prime lenses within its focal length range. Yes, better than Canon primes, better than Nikon primes, better than Zeiss primes, better than Canon zooms, better than Zeiss zooms---it is now possible to build zoom lenses like the 14-24 Nikkor that are SIGNIFICANTLY better performers in multiple areas, than earlier prime lenses and better than earlier zoom lens designs.
The Nikon 14-24 on a Canon 1DsIII - A landscapers report. and to se how it stacks up against multiple top-rated optics see Nikon 14-24mm f2.8 G First Test: Introduction
This is not just a Nikon thing either: Tamron's modest 28-75 f/2.8 zoom lens for example is SUCH an amazing optical design that it has been sought out and re-badged by both Minolta and Pentax, who were both desirous of the lens to the point that they wanted to have their own corporate identity associated with it. Sony continued the licensing arrangement with Tamron.
Many prime lens designs are getting older now, not having been re-designed for quite some time,since there is lower demand for primes than zooms.
I have a lot of prime lenses, and appreciate what they can do, but the newer,better zoom lenses are pretty amazing things!
guess that answers most of my questions! glad to own the tamron 28-75 now :]
knowing all this, does anyone have any good, sharp, zooms that produces good bokeh (i look for that first when it comes to a portrait lens) that would make nice portrait lenses?
i guess i'll state this the third time, but i currently own the tamron 28-75mm... and the nikon 18-55 kit.
and a new question just popped up in my head... how useful are wide angle zooms when it comes to portraiture?