Canon EOS 7 - Manual (Page 97)

Reference
Major Accessories
> Battery Pack BP-300
The vertical grip has its own shutter
button and AE/FE lock button. It houses
four size-AA batteries (alkaline, Ni-Cd,
or nickel hydride). Two CR123A
batteries to power the camera can also
be used.
' EX-series Speedlites 550EX,
420EX, and 220EX
Three EOS-dedicated, E-TTL autoflash
Speedlites are available. The 550EX
with an autozoom head can provide a
large flash output, the 420EX for
affordable high performance, and the
220EX for compactness. The
respective maximum Guide No. (at ISO
100 in meters) are 55, 42, and 22. All
three Speedlites also enable high­
speed sync (FP flash), and FE lock.
With the 550EX and 420EX, E-TTL
wireless autoflash with multiple
Speedlites is possible.
> Macro Ring Lite MR-14EX
EOS-dedIcated macro ring flash
featuring Guide No. 14 (at ISO 100 in
meters), twin flash tubes, and E-TTL
autoflash. You can fire only one or both
flash tubes and control the flash ratio
between the two flash tubes. Fligh-
speed sync (FP flash) and FE lock are
also possible. Sophisticated macro
lighting effects can be obtained and
operation is simple. The MR-14EX can
also be used as the master unit In a
wireless, multi-Speedlite system (with
the 550EX or 420EX as slave units).
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