This article appeared in the March/April
2002 issue of PT. To purchase this issue and receive this and
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As with any significant purchase, shopping for a camera
lens usually begins with the announcement to friends and salespeople
that you’re “in the market.” They’ll be glad
to share their wisdom, typically cultivated by widely accepted myths
they’ve encountered in their own experiences. If you mention
that you’re considering a third-party lens, here are some things
they’ll likely tell you:
• Third party lenses range from just OK to pretty
good.
• Third party lenses are okay if you want to save a few bucks
and can’t afford the “real glass.”
• Third party lenses aren’t as sharp as the real thing;
they work well…unless you’re a real aficionado of fine
imaging.
Does everybody know all that? Are these lenses really
not as sharp? Why not? Who says so? What else is true? What else
should we consider?
Let’s begin with the truth: some lenses are better
than others, regardless of brand (or who’s factory is behind
the nameplate, which is a very different discussion). If you were
a lens maker driven to deliver more productivity to a feature-hungry
market, these are some of the issues—and truths— you’d
have to consider:
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