Sony Alpha CA649W - Manual (Page 9)

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Frame and capture your subject with
uncompromising speed and precision
1
SEC
Unparalleled viewfinder brightness
and a 100% field of view (approx.)
The 900’s viewfinder is a masterpiece
of optical precision in its own right.
Featuring a high-quality optical glass
pentaprism and a new high-power
condenser lens, it offers truly exceptional
brightness, 0.74X magnification (approx.)
and a field of view that covers virtually
100% of the 35mm full-frame sensor’s
large imaging area. A high refractive
index glass eyepiece and condenser
lenses virtually eliminate distortion,
while multi-layer anti-reflective coatings
help prevent ghosting. A spherical
acute matte focusing screen aids
manual focusing by making it easy to
identify correct focus, and a high
eyepoint improves visibility when
wearing eyeglasses.
Optional focusing screens
to suit your shooting style
According to your preference or
shooting needs, the standard Type G
spherical acute matte focusing screen
that comes with the 900 can be
replaced with an optional Type L
spherical acute matte screen or
Type M super spherical acute matte
screen. The L type features grid lines
to enable easier framing, while the
Type M is particularly well-suited to
bright lenses with an aperture of
F2.8 or greater, and features a high-
dispersion screen that makes it easier
to fine-tune the focus manually.
9-point autofocus system with
additional wide-area 10-point assist
A versatile new center dual-cross
9-point AF sensor system provides fast,
accurate autofocusing to ensure
fewer missed shots. Featuring 10
additional sensors to assist in subject
detection when Wide AF is selected,
it also offers improved out-of-focus
detection to reduce focus hunting,
and has a dedicated sensor in the
center of the frame to enhance
accuracy when shooting at apertures
of F2.8 or larger.
24.6-megapixel full-resolution
continuous shooting up to 5 fps
Full-resolution 24.6-megapixel
imaging at speeds of up to about
5 fps is made possible by powerful
Dual BIONZ
™ image processing
engines and a high-power coreless
motor. In addition, a new high-speed
moving-magnet actuator and
parallel-link mechanism are used to
drive the camera’s large swing mirror,
enabling you to enjoy virtually 100%
view-finder coverage without sacrificing
continuous shooting speed. So you can
capture the perfect moment even when
you’re shooting sports or other active
subjects, and still enjoy the rich color
and exquisitely fine detail that are a
hallmark of the 900’s 24.6-megapixel
35mm full-frame imaging.
Super spherical acute matte
Type M focusing screen
FDA-FM1AM
Spherical acute matte
Type L focusing screen
FDA-FL1AM
Mirror box unit and
parallel-link mechanism
Viewfinder schematic
Glass pentaprism
Eyepiece lens
High-power
condenser lens AF sensors AF assist sensors
Screen images simulated.