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Sony Alpha A100 Indoor Crops

10 Megapixels10 MegapixelsSingle Lens ReflexSingle Lens ReflexStabilization: Compensates for tiny involuntary movements of the camera.Stabilization: Compensates for tiny involuntary movements of the camera.Continuous DriveContinuous DriveManual 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.Accepts Compact Flash memory.Accepts Compact Flash 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

Just below, the Sony Alpha A100 is compared to its closest competitor, the Pentax K10D. The top row presents the overall scene at ISO 100. Below that are 100% scale crops taken from full-resolution images at each ISO setting from its respective camera. These shots were taken during the day using program mode with no exposure compensation and set ISO sensitivity.

The Sony Alpha A100 shows low noise levels below ISO 400. At ISO 400, noise become noticeable at 100% but has little effect on image details. ISO 800 and 1600 images from the A100 show increased noise and reduced details. This is where the performance of the Alpha A100 is below that of the average DSLR.

The most noticeable difference between the A100 and K10D shots is the different exposure. Since the scene below is very contrasty, neither camera can capture its entire dynamic range. The result is that the Alpha A100 chose to expose more conservatively than the K10D to preserve more details in the highlights on the glass bottles. The difference is about 2-stops, which is quite significant. It is important to mention that during testing there we also cases when the K10D produced a darker exposure than the A100.

In terms of noise levels, it can be seen that the A100 produces noticeably more noise at ISO 800 and 1600. There is also a softening of details starting at ISO 400, although it is not as pronounced as with the night ISO shots. Overall, results from the A100 are very usable until ISO 400. Higher ISO settings should be reserved for small prints.

Sony Alpha A100 Pentax K10D

Entire scene

Entire scene

ISO 100 0.5s F8

ISO 100 2s F8

ISO 200 1/4s F8

ISO 200 1s F8

ISO 400 1/8s F8

ISO 400 1/3s F8

ISO 800 1/15s F8

ISO 800 1/6s F8

ISO 1600 1/30s F8

ISO 1600 1/10s F8

ISO Lo80 0.8s F8

The sample to the left uses the Sony Alpha A100's unique Lo80 mode which exposes for ISO 80 and adapts the image tone-curve for low-key subjects. The scene here is an ideal subject for Lo80. The result is an image with very low noise and increased details in its darker areas. Note that this has to makes the darker areas brighter to store the added details in the JPEG file.


ISO Hi200 0.4s F8

The sample to the left uses the Sony Alpha A100's unique Hi200 mode which exposes for ISO 200 and adapts the image tone-curve for high-key subjects. This scene is actually not ideal for this mode as it contains much less highlights than shadows. The result is only minor differences between the standard ISO 200 shot and this Hi200 shot.

Sony Alpha A100
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By on 2007/03/31
3

Sony A100 Facts


SLR digital camera

Sensor-Size: 24 x 16mm

APS-C Sensor

Actual size when viewed at 100 DPI

10 Megapixels DSLRISO 80-1600
Sony A Mount
1.5X FLM
Shutter 1/4000-30s
2-Axis Built-in StabilizationFull manual controls, including Manual Focus
95% Coverage
Medium Viewfinder
Custom white-balance with 1 axis fine-tuning
Automatic Eye-Start sensorSpot-Metering
Built-in Dust ReductionHot-Shoe
3 FPS Drive, Unlimited ImagesLithium-Ion Battery
2.5" LCD 230K PixelsCompact Flash
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