Sony Alpha 37 SLT: Lab Test Results & Comments
The camera can record Full HD video with 1920x1080 pixels and in 60i or 24p mode. It uses high bit rates (up to 24 Mbit/s) to create high-quality AVCHD movies. In addition, it can record MP4 movies (1440x1080 pixels) for direct Internet upload. In video mode the camera offers continuous autofocusing, which makes the handling of the A37 as easy as a simple camcorder.
The AF system uses 15 AF sensors (including three cross-type sensors), notable for an entry-level system. The electronic viewfinder shows the currently active AF field and a very brilliant and high-resolution image (1.44 million RGB dots). However, the LCD screen on the back has a very low resolution of only 230,400 RGB dots. The screen size of 2.7” isn’t quite state of the art. The camera offers all standard image modes like P, S, A, and M. In addition, the photographer has access to scene modes for many photographic situations.
Color: The automatic white balance system has some problems with fluorescent light, which is used as the standard lighting setup in our tests. The standard test box shot and the portrait shot show a slight yellowish touch in gray or white areas like the background. Saturation is surprisingly low for a Sony camera, but this 103.7 saturation is one reason for the generally low error level shown in our test chart. Most important, however, is that skin tones are nearly perfectly reproduced.
Sharpness: The Sony A37 showed an average performance in the resolution tests. The sharpness result is reduced by the very intense anti-noise filtering and a very decent USM filtering of JPEG images. The camera gained a maximum of 2668 lines per picture height, which is a low result for a camera with a nominal resolution of 3264 lines per picture height. We noticed a slight softness in the images in our standard test box shot and portrait.
Noise: The camera showed good performance in our noise tests. The luminance noise factor stays under 1.0 up to ISO 3200, which is very good, but this comes as a result of an intense anti-noise filtering, which smooths the images and causes a lower resolution/sharpness test result. Color noise is very unobtrusive—the red, green, and blue pixel curves show nearly an identical shape. With a maximum of 10.6 f/stops the dynamic range is on an average level for SLT and CSC cameras.
The Sony A37 SLT has a list price of $599 with a kit lens. For more information, visit www.store.sony.com.
+ Compact SLT design
+ Very fast autofocus based on phase detection and the SLT system (continuously active even in video mode)
+ Nice color reproduction
- Low-resolution LCD screen
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Lab results and test images by BetterNet, our TIPA-affiliated testing lab. Edited by George Schaub.