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Sony Alpha SLT-A55 Indoor Crops

16 Megapixels16 MegapixelsElectronic View FinderElectronic View FinderHigh ISO: ISO 6400 or more is available at full-resolution.High ISO: ISO 6400 or more is available at full-resolution.Stabilization: Compensates for tiny involuntary movements of the camera.Stabilization: Compensates for tiny involuntary movements of the camera.Level: Measures camera tilt and helps to keep the horizon level.Level: Measures camera tilt and helps to keep the horizon level.Continuous DriveContinuous DriveFull 1080p HD Video: 1920 x 1080 resolution or more but less than 4K.Full 1080p HD Video: 1920 x 1080 resolution or more but less than 4K.Manual Controls: Both fully-manual (M) and semi-automatic modes (T and V).Manual Controls: Both fully-manual (M) and semi-automatic modes (T and V).Custom White-Balance: Specifies exactly what should be white to the camera.Custom White-Balance: Specifies exactly what should be white to the camera.Action Photography: Shutter speeds of 1/1500 or more.Action Photography: Shutter speeds of 1/1500 or more.Night Photography: Reaches shutter-speeds longer than 4 seconds.Night Photography: Reaches shutter-speeds longer than 4 seconds.Hotshoe: Allows external flash units to be attached.Hotshoe: Allows external flash units to be attached.Spot MeteringSpot MeteringDepth-Of-Field Preview: Improve perception of DOF before shooting.Depth-Of-Field Preview: Improve perception of DOF before shooting.Live-View: Lets DSLR cameras use the rear LCD as an EVF.Live-View: Lets DSLR cameras use the rear LCD as an EVF.Built-In GPSBuilt-In GPSAccepts Secure Digital Extended Capacity (SDXC), SDHC and SD memory.Accepts Secure Digital Extended Capacity (SDXC), SDHC and SD memory.Accepts Memory Stick Duo memory.Accepts Memory Stick Duo memory.Neocamera detailed reviewNeocamera detailed reviewDiscontinued: No longer produced by the manufacturer. May still be in stock or found used.Discontinued: No longer produced by the manufacturer. May still be in stock or found used.

Indoor Crops

Here, the Sony Alpha SLT-A55 is compared to the Pentax K-5
Pentax K-5
which most likely shares the same image sensor. All images below are 100% unmodified crops from their respective cameras. Both cameras were set to F/8 in aperture-priority mode with fixed ISO and custom white-balance. As usual, the cameras were calibrated to give the highest quality and most realisitc results possible. The Sony used a Minolta 50mm F/1.4 lens while the Pentax used a DA* 55mm F/1.4.

These crops help determine which ISO settings can be acceptably used on these cameras. As image noise increases, most cameras compensate with noise reduction which introduces softness. The point at which a print become unacceptably noisy is a matter of personal taste. The crops below do show much more crispness on the Pentax side which serves it very well. At ISO 800 the Sony's softness, which is most likely due to different noise-reduction, hides noise a little better. That being said, images remain equally usable to ISO 1600 or 3200 depending on print sizes. After that, the Pentax K-5 pulls ahead, managing slightly more than a 1-stop lead. This is quite impresive of the Alpha SLT-A55 which costs half as much as the Pentax K-5, the present image quality champion among cropped-sensor DSLRs.

Sony Alpha SLT-A55 Pentax K-5

ISO 100

ISO 100

ISO 200

ISO 200

ISO 400

ISO 400

ISO 800

ISO 800

ISO 1600

ISO 1600

ISO 3200

ISO 3200

ISO 6400

ISO 6400

ISO 12800

ISO 12800

ISO 25600

ISO 51200
Sony Alpha SLT-A55
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By on 2011/01/30
3

Sony SLT-A55 Facts

Mirrorless digital camera
16 Megapixels MirrorlessISO 100-25600
Sony A Mount
1.5X FLM

Sensor-Size: 24 x 16mm

APS-C Sensor

Actual size when viewed at 100 DPI

Shutter 1/4000-30s
2-Axis Built-in StabilizationFull manual controls, including Manual Focus
0.46" Built-in EVF 1.4 Megapixels (0.73X)Custom white-balance with 1 axis fine-tuning
Automatic Eye-Start sensorSpot-Metering
2 Axis Digital LevelHot-Shoe
Built-in Dust ReductionStereo audio input
10 FPS Drive, 35 ImagesLithium-Ion Battery
1920x1080 @ 30 FPS Video RecordingSecure Digital Extended Capacity
3" LCD 920K PixelsMemory Stick Duo
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