the standard EF mount. There’s a detachable
tripod foot as well.
WHAT WE LIKED
For long-time photographers and
filmmakers, the Speed Booster ULTRA 0.71x
feels a little like magic. Many of us have used
so called non-electronic “dumb” lens adapters
at different times. Little more than extension
tubes, these were frustrating to deal with,
had no electronic control and gave no optical
advantage. The Speed Booster on the other
hand, communicates smoothly between the
lens and body. In terms of settings and control,
there is no difference between using a Speed
Booster with an EF lens and a native Micro
Four Thirds lens.
Most importantly, the Speed Booster does
exactly what it was designed for. It gives you the
ability to have a shallower depth of field and an
extra stop of light when filming with Micro Four
Thirds lenses. The Speed Booster does the job
it was designed to do and does it well.
WHAT WE DIDN’T LIKE
Autofocus should be viewed as a partial
bonus when using the Speed Booster rather
than a full feature. It works, but Metabones
makes no secret of the fact that it has some
limitations. It will only work with a specific set
of lenses, and is not at all comparable to native
lens AF performance.
When introduced, the Metabones Speed
Booster ULTRA 0.71x offered autofocus
with Panasonic bodies. A recent firmware
update, which was very easy to apply, added
autofocus for Olympus as well. But Olympus
cannot use AF while filming and neither can
use C-AF or Tracking-AF. Single AF works,
particularly for still photos, but it stutters
and is slow compared to native lenses. It
is, however, fairly accurate within these
limitations. That shouldn’t be a big deal for
most serious professionals though, as few
trust autofocus for filmmaking.
HOW IT COMPARES
There are precious few competitors to
the Speed Booster on the market. Most of what
is available are either “dumb” adapters with no
electronic control or Speed Booster knock-offs
of wildly varying quality. If you are a mirrorless
filmmaker who has access to full-frame lenses,
there is almost no reason why you wouldn’t
want to get your hands on a Speed Booster.
It is one of those rare products that lives up to
virtually all of its hype.
YOUR USED PHOTO
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