Sony DSLR-A850 手册
154
Others
Specifications
Camera
[System]
Camera Type
Digital Single Lens Reflex
Camera and
interchangeable lenses
Camera and
interchangeable lenses
Lens
All of
α Lens (except for
DT lens*)
* Using a DT lens is not guaranteed
because the corners of the field are
darkened and the camera does not
meet the primary AE performance
standard. [APS-C size capt.] is
automatically selected.
darkened and the camera does not
meet the primary AE performance
standard. [APS-C size capt.] is
automatically selected.
[Image sensor]
Total pixel number of camera
Approx. 25 720 000 pixels
Effective pixel number of camera
Approx. 24 610 000 pixels
Image format
35 mm (35.9×24.0) CMOS
sensor
sensor
[SteadyShot]
System
Sensor-Shift mechanism
SteadyShot Compensation capability
Approximately 2.5 to 4 EV
decrease in shutter speed
(varies according to
shooting conditions and
lens used)
decrease in shutter speed
(varies according to
shooting conditions and
lens used)
[Anti-Dust]
System
Charge protection coating
on Low-Pass Filter and
image sensor-Shift
mechanism
on Low-Pass Filter and
image sensor-Shift
mechanism
[Viewfinder]
Type
Fixed eye-level system
with pentaprism
with pentaprism
Focusing Screen
Spherical Acute Matte
(exchangeable, option)
(exchangeable, option)
Frame coverage
Approx. 0.98
Magnification
0.74 × with 50 mm lens at
infinity, –1 m
infinity, –1 m
–1
Eye point
Approximately 20 mm
from the eyepiece
from the eyepiece
Diopter Adjustment
–3.0 to +1.0 m
–1
[Auto Focus System]
System
TTL phase-detection
system, CCD line sensors
(with center dual cross-hair
sensor, F2.8 sensor)
system, CCD line sensors
(with center dual cross-hair
sensor, F2.8 sensor)
Ranging point
9 points and 10
supplementary ranging
points
supplementary ranging
points
Sensitivity Range
0 to 18 EV (at ISO 100
equivalent)
equivalent)
AF illuminator
Approx. 1 to 7 m (3.3 to
23 feet)
23 feet)
[Exposure]
Metering Cell
40-segment honeycomb-
pattern SPC
pattern SPC
Metering Range
0 to 20 EV (2 to 20 EV
with Spot metering), (at
ISO 100 with F1.4 lens)
with Spot metering), (at
ISO 100 with F1.4 lens)
ISO sensitivity (Recommended
exposure index)
AUTO, 100 to 6400
AUTO, 100 to 6400