Gordon Ross wrote:
> Photo Do doesn't seem much of a fan of Oly glass. For instance the Nikkor
> 28/2.8 rates 30% higher than the Zuiko 28/2.0 - really? The Nikkor 20/2.8
> is 15% higher than the 20/2.0 Zuiko ?
It is easier to produce a really high-quality lens with a dim maximum
aperture than it is to produce a really high-quality lens with a bright
maximum aperture. Of course, it is even easier to produce a really crap
lens whatever maximum aperture it has. All lenses are compromises with
regard to: maximum aperture, contrast, resolution, size, weight, durability,
cost of production. The designer of the lens balances these different
factors to best meet the objectives set by the company's product-planning
department.
Summary: you cannot deduce anything about the performance of a lens based
solely on its maximum aperture. A bright lens might perform better than a
dim one, but it is equally possible that the bright lens performs worse than
the dim one.
-- from Cy in the UK
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|