Where to Find the Aperture
All
lenses have a maximum aperture, and all NIKKOR lenses list the widest possible
aperture on the lens barrel. Some zoom lenses will detail something like
f/3.5-5.6 on the lens barrel or 1:3.5-5.6 (below right). These numbers, the 3.5
and the 5.6, are referring to the maximum aperture or widest opening the lens
can achieve for each end of the zoom range. Some higher end lenses can maintain
the largest aperture throughout the entire zoom range, so only one number is
detailed (below left).
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