Bringing the speed Sony mirrorless shooters have been waiting for, the
Alpha a9 Mirrorless Digital Camera takes impressive multimedia
capabilities and ups the processing capabilities for ultra-fast
continuous shooting. Making use of a 24.2MP full-frame Exmor RS stacked
CMOS sensor and BIONZ X image processor, the a9 is capable of shooting
at up to 20 fps, recording UHD 4K video internally, and shooting with an
expanded sensitivity range to ISO 204,800. Balancing the quickness of
the processor is a well-matched 693-point phase-detection autofocus
system that covers 93% of the image area for accurate and quick subject
tracking in a variety of lighting conditions. Additionally,
complementing both the imaging and focusing assets, the a9 also sports
5-axis SteadyShot INSIDE image stabilization to minimize the appearance
of camera shake when shooting handheld.
Matching its professional imaging capabilities is a well-rounded
physical construction that is fully weather-sealed for use in trying
environmental conditions. For clear, uncompromised viewing, a quad-VGA
OLED Tru-Finder is featured with an impressive 3.686m-dot resolution and
120 fps refresh rate for clear, bright, and smooth eye-level viewing.
Alternatively, a 3.0" 1.44m-dot tilting touchscreen LCD is also
available to benefit working from high and low angles. Dual SD memory
card slots, a customizable menu system, and a variety of physical
control dials further round out the camera's intuitive design, and
built-in Wi-Fi and Bluetooth enables wireless image sharing and remote
camera control from linked mobile devices.
24.2MP Full-Frame Exmor RS Stacked CMOS Sensor
Poised for speed, the a9 features a first-for-full-frame 24.2MP Exmor RS
stacked CMOS that affords impressively quick readout speeds to benefit
up to 20 fps continuous shooting and UHD 4K video recording. The
sensor's back-illuminated design also affords high sensitivity to an
extended ISO 204,800 with reduced noise for clean image quality in a
variety of lighting conditions. Additionally, uncompressed raw files can
be recorded in 14-bit for greater color fidelity and post-production
BIONZ X Image Processor
Working in conjunction with the stacked CMOS sensor is an apt BIONZ X
image processor that ensures quick processing speeds to keep up with
fast-paced shooting applications. Continuous shooting up to 20 fps is
supported for up to 362 consecutive JPEGs, or 241 raw frames, along with
a top electronic shutter speed of 1/32,000 for freezing fast-moving
subjects or working in bright lighting conditions. Benefitting the fast
recording capabilities is an equally quick AF/AE metering system that
functions at 60 times per second to continuously evaluate the scene in
order to lock onto and track moving subjects. Additionally, due to the
use of an electronic shutter, totally blackout-free monitoring is
possible with the electronic viewfinder for more accurate compositions
of moving subjects.
693-Point Phase-Detection AF
Covering 93% of the image area, a focal-plane phase-detection autofocus
system incorporates 693 points along with 25 contrast-detection areas
for quick and precise focusing in in a variety of lighting conditions
with sensitivity down to -3 EV. The density of focusing points from this
hybrid AF system also enables High-density Tracking AF Technology, which
is adept at tracking moving subjects in a variety of lighting
conditions. The use of phase-detection points also enables the use of
A-mount lenses via the optional LA-EA3 or LA-EA1 lens mount adapters
with full continuous AF/AE tracking compatibility.
The apt focus system also lends itself to a variety of focusing
functions for refined accuracy, including Lock-on AF, which maintains
focus on moving subjects throughout the use of a configurable frame that
is set over the desired moving subject, and Expand Flexible Spot, which
employs neighboring focus points to retain focus on moving subjects even
if the originally selected point loses focus. Additionally, Eye AF can
be used to base focus on recognized subjects' eyes for portraits and is
available in both AF-S and AF-C modes. Autofocus can also be used in
conjunction with the Focus Magnifier function for critical focus when
homing in on minute subject details.
In addition to autofocus, the a9 also features a Peaking MF function to
benefit manual focus control by highlighting sharp edges of contrast for
a more objective means of acquiring sharp focus.
5-Axis SteadyShot INSIDE Image Stabilization
Packed into the robust a9 is a 5-stop effective 5-axis SteadyShot INSIDE
image stabilization system that compensates for five different types of
camera shake encountered during handheld shooting of stills and video.
This allows users to confidently use any lens, even adapted lenses, for
critical imaging without encountering blur from camera shake.
For long focal lengths, the system will correct for pitch and yaw
adjustments. Macro and high-magnification imagery, on the other hand,
will benefit from the inclusion of horizontal and vertical shift
compensation. All shooting styles will get usage out of the roll
compensation. All 5 axes of stabilization will function at all times,
even when used with third-party lenses and adapters or lenses with
built-in optical stabilization.
UHD 4K Video Recording in XAVC S Format
Internal recording of UHD 4K movies is possible in multiple frame rates
up to 30 fps and, based on the Super35mm recording area and effective
20MP (6000 x 3376) resolution, 2.4x oversampling renders greater detail
and full pixel readout is possible, that is void of pixel binning, for
higher quality imagery with reduced moiré and aliasing. Full HD 1080p
recording is also supported in frame rates up to 120 fps, and both
resolutions utilize the 100 Mbps XAVC S format contained within an MP4
wrapper with 4:2:0 sampling. The high-speed, 120 fps recording also
enables 4x and 5x slow-motion movie recording with the frame rate set to
either 30p or 24p. In addition to high-resolution internal recording,
uncompressed HDMI output also enables the use of an optional external
recorder for clean 4K recording with 4:2:2 sampling.
4K video recording also avails the ability to produce 8MP stills during
playback by taking a frame grab from a movie and storing it as a
Slow & Quick Motion
Take more control over your video capture capabilities with a variety of
new frame rates available in an S&Q mode. This will allow shooters to
capture Full HD video at one of either steps between 1-120 fps. These
settings will allow you to slow down action as well as speed up a
slow-moving scene. This setting is also NTSC/PAL switchable.
Enhanced Zebra Function
An enhanced Zebra function is ideally suited to aid in monitoring
exposure values in high-contrast scenes. Video signal level targets can
be set from 0 to 109, and specific ranges can be set to make exposure
level adjustments easier.
Time Code and User Bit Settings
A time code can be used to record hours, minutes, seconds, frames on
image data for more precise editing while the User Bit function can
record date, time, and scene number to aid in editing together footage
from multiple cameras.