130 Better Available Light Digital Photography
to—and most of the time beyond—Joe’s expectations. As L-
series lenses go, this one’s a bargain—not only in price, but also
in its ability to function under a wide range of diffi cult photo-
graphic conditions. Sometimes the difference between getting a
good shot and not getting any shot is a matter of the tools at
hand, and the EF 70–200 mm f/4 L IS USM was the right tool
at the right time.
In-body stabilization
Olympus, Pentax, and Sony offer in-camera stabilization that
works in similar ways. The Shake Reduction (SR) system in the
Pentax K100D offers a two-stop advantage for sharp, blur-free
images when made under diffi cult shooting conditions, such as
using a long telephoto lens or shooting in low light without a
Joe’s not a bird photographer,
but the EF 70–200 mm f/4 L IS
USM, especially with its image
stabilization, helped him get this
photo of a heron that took off just
ahead of his boat while navigating
the Tres Palos lagoon. Exposure
was 1/640 sec at f/13 at ISO 320.
© 2006 Joe Farace.
Because the Pentax K100D has
Shake Reduction (SR) system built
into the body, the camera system
does not require special (read
expensive) anti-shake lenses and
can be used with almost all exist-
ing Pentax-mount interchangeable
lenses, including those vintage
manual focus Takumar lenses you
inherited from your granddad.