Sony Alpha SLT-A33: High Dynamic Range comparison
The Alpha SLT-A33 inherits the in-camera High Dynamic Range (HDR) capabilities of recent Sony cameras. This fires-off three frames at a choice of exposure increments, then automatically combines them into a single image with increased dynamic range – great for protecting detail in highlights and shadows, and like the camera's other cunning modes can be used handheld.
By default, the A33 chooses the exposure increment for you in Auto HDR mode, you can alternatively select exposure increments of 1 to 6EV in single EV steps; that's a huge range and while HDR aficionados may have preferred an additional option to shoot more than three frames (or have broader bracketing options for HDR assembly on their computers), it remains a very powerful feature to find in-camera.
To put the capability to the test we photographed our High ISO Noise composition first with HDR and DRO disabled, then at each of the HDR increments from 1 to 6EV. To illustrate exactly what's going on, we've included a histogram below each image.
Each of these exposures was taken with zero compensation, but Sony regulars will know there can be benefits to metering for the highlights in order to protect them. So our final two examples show the A33 with -2EV compensation applied, first with HDR and DRO disabled, and secondly with HDR manually set to 6EV. Obviously -2EV compensation and the maximum HDR increment are extreme examples, but they illustrate what's possible.
Next head on over to our Sony Alpha SLT-A33 Sample Images Gallery for more examples across its sensitivity range, or head straight over to our verdict!
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Sony Alpha SLT-A33: DRO / HDR disabled
Sony Alpha SLT-A33: HDR 1EV
Sony Alpha SLT-A33: HDR 2EV
Sony Alpha SLT-A33: HDR 3EV
Sony Alpha SLT-A33: HDR 4EV
Sony Alpha SLT-A33: HDR 5EV
Sony Alpha SLT-A33: HDR 6EV
Sony Alpha SLT-A33: DRO / HDR disabled, -2EV compensation
Sony Alpha SLT-A33: HDR 6EV, -2EV compensation
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