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Sony a450
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Sony a500
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Sony a550
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Price
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<$900 (?)
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$749.99
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$950
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Effective Pixels
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14.2 million
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12.3 million
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14.2 million
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Sensor Size
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23.4 x 15.6 mm APS-C Type CMOS
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23.4 x 15.6 mm APS-C Type CMOS
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23.4 x 15.6 mm APS-C Type CMOS
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Aspect Ratio
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3:2
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3:2
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3:2
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Image Stabilization
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Image-Sensor shift ("SteadyShot INSIDE")
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Image-Sensor shift ("SteadyShot INSIDE")
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Image-Sensor shift ("SteadyShot INSIDE")
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Continuous Shooting Speed
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Speed- Priority: 7 fps max
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5 fps max
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Speed- Priority: 7 fps max
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Maximum Burst
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RAW: Up to 14 frames, RAW+JPEG: Up to 7 frames, JPEG (Fine): 32 frames, JPEG (Standard): 116 frames
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RAW: 6 frames
RAW+JPEG: 3 frames
Fine: 12 frames
Standard: 58 frames
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RAW: Up to 14 frames, RAW+JPEG: Up to 7 frames, JPEG (Fine): 32 frames, JPEG (Standard): 116 frames
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Autofocus System
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TTL CCD line sensors (9-points,with center cross sensor)
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TTL CCD line sensors (9-points,with center cross sensor)
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TTL CCD line sensors (9-points,with center cross sensor)
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AF Points/Areas
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Wide AF area, Spot AF area (center), Focus area selection (any of 9)
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Wide AF area, Spot AF area (center), Focus area selection (any of 9)
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Wide AF area, Spot AF area (center), Focus area selection (any of 9)
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Focus Modes
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Single-shot AF, Continuous AF, Automatic AF, Manual focus
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Single-shot AF, Continuous AF, Automatic AF, Manual focus
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Single-shot AF, Continuous AF, Automatic AF, Manual focus
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Dust reduction
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Dust reduction • Charge protection coating on low-pass filter, Sensor-shift dust reduction mechanism
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Dust reduction • Charge protection coating on low-pass filter, Sensor-shift dust reduction mechanism
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Dust reduction • Charge protection coating on low-pass filter, Sensor-shift dust reduction mechanism
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Metering Modes
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Multi-segment (40 segment Honeycomb pattern), Center-weighted, Spot
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Multi-segment (40 segment Honeycomb pattern), Center-weighted, Spot
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Multi-segment (40 segment Honeycomb pattern), Center-weighted, Spot
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Metering System
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TTL Multi-segment (40 segment Honeycomb pattern)
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TTL Multi-segment (40 segment Honeycomb pattern)
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TTL Multi-segment (40 segment Honeycomb pattern)
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Manual ISO Sensitivity Range
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ISO 200- ISO 12800
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ISO 200- ISO 12800
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ISO 200- ISO 12800
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Auto ISO Sensitivity Range
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ISO 200-1600
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ISO 200-1600
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ISO 200-1600
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Shutter Speeds
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30 to 1/4000 sec, Bulb
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30 to 1/4000 sec, Bulb
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30 to 1/4000 sec, Bulb
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Viewfinder Coverage
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95%
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95%
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95%
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Focusing Screen
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Fixed
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Fixed
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Fixed
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Compression/Quality Options
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RAW (.ARW), RAW + JPEG Fine, RAW + JPEG Standard, JPEG Fine, JPEG Standard
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RAW (.ARW), RAW + JPEG Fine, RAW + JPEG Standard, JPEG Fine, JPEG Standard
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RAW (.ARW), RAW + JPEG Fine, RAW + JPEG Standard, JPEG Fine, JPEG Standard
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LCD Monitor
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6.7cm (2.7") TFT Clear Photo LCD, 230,400 dots (no-tilt)
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7.6cm (3") TFT Clear Photo LCD, 230,400 dots (tilt)
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3.0 TFT Xtra Fine LCD, 921,600 dots (tilt)
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Storage
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SD/ SDHC, Memory Stick Pro Duo / Pro HG Duo
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SD/ SDHC, Memory Stick Pro Duo / Pro HG Duo
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SD/ SDHC, Memory Stick Pro Duo / Pro HG Duo
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Live View (fast)
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No
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Yes
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Yes
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Live View (MF)
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Yes
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Yes
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Yes
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Battery
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NP-FM500H Lithium-Ion rechargeable battery (1650 mAh)
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NP-FM500H Lithium-Ion rechargeable battery (1650 mAh)
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NP-FM500H Lithium-Ion rechargeable battery (1650 mAh)
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Dimensions (WxHxD)
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137 x 104 x 81mm (5.5 x 4.2 x 3.2 in)
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137 x 104 x 84 mm (5.5 x 4.2 x 3.9 in)
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137 x 104 x 84 mm (5.5 x 4.2 x 3.9 in)
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Weight
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520 g (1.1lb)
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597 g (1.3lb)
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599 g (1.5lb)
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