Sony Alpha SLT-A37 First Impressions Review
The A37 features the same 15-point autofocus sensor that's found on the A35, but with some key differences. It's still got 3 cross-type sensitive sensors, but the camera now allows for both manual focus peaking (with control over type and sensitivity) as well as zonal autofocus. The camera also now features subject tracking AF, which is very useful when shooting action photography. Like all other Sony SLT cameras, the A37 can use phase-detection autofocus even while recording video and shooting in live view.
Exposure & Metering
The Sony Alpha A37 has an upgraded metering system from the A35, sporting a 1200-zone system as opposed to the 49-zone system on the A35.. The system is still sensitive from -2 to 17 EV, but it now has a few new tricks up its sleeve. The main one comes in the way of face detection with registration and selection, letting you prioritize faces in the frame. The system is otherwise the same, though it benefits from an extra bit of ISO sensitivity due to the new image sensor.
The A37 has an ISO range of 100-16000 available to it, with it able to reach all the way to 25600 in multi-frame noise reduction mode. ISO 16000 is a bit higher than what some of the A37's competition offers, but as it's not a full stop over the usual 12800 setting, it's not something to lend too much extra weight to.
When shooting in a variety of lighting conditions, you invariably have to account for various color temperatures. The A37 accomplishes this via the usual method, with custom and automatic white balance complemented by various white balance presets available to the user. These presets include daylight, shade, cloudy, incandescent, fluorescent, flash, color filters, and custom kelvin temperature entry.
The Alpha A37 uses image sensor shift stabilization, in line with other SLT cameras from Sony. This means that your image will be stabilized regardless of what lens you attach to the camera (even older Minolta lenses). Sony claims as much as 4 stops of improved sharpness out of the camera, though we typically see less of an improvement under our lab conditions.
As with the A35, the A37 features 7 types of picture effects, with 11 total variations, allowing you to alter your image in a variety of ways. The picture effects include posterization, pop color, retro, partial color, high contrast monochrome, toy camera, soft high-key, soft focus, HDR painting, and miniature.