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Dual AF System
Dual AF System is the world’s first* AF
system to employ two phase detection
sensors. By maximizing the strengths
of both sensors, it vastly improves
subject tracking performance as well
as focusing precision. The 19-point
(
11 cross-point
)
phase detection AF
sensor mounted above the translucent
mirror provides high-precision focusing
performance and depth detection,
while the 102-point focal plane phase
detection AF sensor overlaying the
image sensor offers the advantages of
wider depth and width
(
object plane
)
coverage. Together, these sensors
deliver a new level of AF performance
and functionality.
* The world’s first AF system in a 35mm full-frame
interchangeable lens digital camera to feature
two phase detection sensors as of September 12,
2012, according to Sony’s internal survey. Notes:
Only the following lenses currently support AF-D
mode and area assist display in AF Range Control
: Vario-Sonnar T* 24–70mm F2.8 ZA SSM, 50mm
F1.4, 28–75mm F2.8 SAM, 70–400mm F4–5.6 G
SSM, 500mm F4 G SSM, and New 300mm F2.8 G.
(
Firmware updates are also planned for other
A-mount lenses. Please refer to the Sony website
for more details.
)
Translucent Mirror Technology
Sony Translucent Mirror Technology revolutionized interchangeable lens cameras
by replacing the swinging mirror of SLRs with a stationary translucent mirror that
continuously directs light to the AF sensor and image sensor. This innovation enables
both full-time phase detection AF and full-time live view through the viewfinder and
rear LCD monitor during single shot, continuous and movie shooting.
Now Translucent Mirror
Technology boasts another
breakthrough—Dual AF System.
By simultaneously directing light
towards two phase detection AF
sensors, it essentially doubles the
potential of autofocus for serious
photographers.
Translucent Mirror
102-point Focal plane
Phase detection AF sensor
19-point
(
11 cross points
)
Phase detection AF sensor
Cross sensors
Focal plane phase detection AF sensor
AF sensors
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