Sony Alpha SLT-A37 review: Sony Alpha SLT-A37

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CNET Editors' Rating

5 stars Spectacular
Review Date:
Updated on:

The Good Sharp lens; Punchy colours; Excellent video performance.

The Bad No optical viewfinder.

The Bottom Line There's very little to fault in the highly versatile Sony Alpha SLT-A37. Its output really shines, with punchy colours and plenty of sharp, well-defined detail. Video performance is among the best, and it's extremely well priced. As such, it's one of the cheapest ways for hobby and weekend photographers to buy into semi-pro kit.

CNET Editors' Choice Aug '12

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Looks can be deceiving. The Alpha SLT-A37 isn't technically a dSLR -- it's what Sony terms an SLT (single-lens translucent), the 'translucent' applying to the mirror that sits in front of the sensor.

It has much in common with a compact system camera like Panasonic's Micro Four Thirds range in that it has no optical viewfinder, yet it boasts the benefits of a dSLR, including a choice of interchangeable lenses.

You can pick up the Sony Alpha SLT-A37 for around £400 for the body only.

Specs

The lack of an optical viewfinder shouldn't be a cause for concern, as the screen in its eyepiece is fine-grained and very detailed. Image quality on it is excellent. The overlaid graphics showing shooting settings, focus points and so on, are finely rendered and extremely easy to read. There's a diopter wheel to one side if you find it's not quite focused for your eyesight, and a proximity sensor just below the eyepiece that switches automatically between that and the 2.7-inch LCD screen on the back.

The screen is articulated through 180 degrees on the horizontal plane, allowing you to tilt it up and down for overhead or low-down shots -- a boon at concerts and sporting events.

Detail test
There's no optical viewfinder, but its digital replacement is fine-grained and clear, and the LCD display swivels for overhead shots.

The model on test is the A37K -- the K marking out the fact that it's bundled with Sony's 18-55mm kit lens. In 35mm terms, those measurements, which are common to many manufacturers' entry-level kit lenses, equate to 27-82.5mm and represent slightly better than a 3x zoom. Maximum aperture at wide angle is f/3.5. At full telephoto it's f/5.6. Both of these are par for the course.

The sensor is an APS-C-sized chip with an effective resolution of 16.1 megapixels, outputting 4,912x3,264 pixels in JPEG or raw format (or both side by side should you choose). Images are written to either SD or Memory Card, with the two formats sharing a single slot. You can't install them both at once, so it's not possible to split the image formats between different media as you can with the Nikon D800 , for example.

Detail test

The colours produced by the 16-megapixel sensor are bold and realistic, and the kit lens is sharp and accurate (click image to enlarge).

Using the A37

Using a Class 4 memory card in my tests, burst mode shot four full-resolution shots raw files with accompanying JPEGs before needing to pause to clear the buffer. It shot five when saving just raw files, and six when snapping JPEGs, after which it carried on shooting with a delay of around 1 second between each frame.

The A37's maximum sensitivity is ISO 16,000 and the lowest is ISO 100. Low-light performance was very good. At ISO 3,200, there was naturally some noise in the results, but this was kept to a minimum and was sufficiently controlled to not impact the shot greatly. Colours remained true, and when viewed full screen, rather than zoomed to 100 per cent, detail remained sharp.

Detail test

In low light the A37 kept noise to a minimum. This image was shot without flash or artificial light at ISO 3,200 (click image to enlarge).

It achieve an excellent result in the still-life test. This involves shooting a collection of everyday objects under studio lighting, and again using both the available ambient light and the camera's onboard flash.

Under studio lighting, and with the aperture set to f/13 to extend the depth of field, the A37 set its sensitivity to ISO 500, but the level of the noise in the image remained very low. Fine detail was cleanly rendered and barely disturbed by the additional grain.

It resorted to ISO 3,200 when shooting in ambient light. Although some of the white background lost detail, other bright objects, such as the white fur on a child's toy, were full of texture and demonstrated no clipped highlights. The noise seen in the previous ISO 3,200 test was also evident here, and it made it impossible to read very fine writing on the label of a miniature spirit bottle. Otherwise, the frame was cleanly and accurately rendered.

When using the flash, there was a rather sharp and slightly unattractive fall-off in the level of illumination towards the back of the scene, and a shadow from the lens barrel at the bottom of the frame. Furthermore, the shadows that it cast were slightly harsh -- particularly when compared with those cast by the consumer Sony Cyber-shot DSC-W690 . However, noise was greatly reduced, despite sensitivity still being set to ISO 800. Small characters on my test objects were easy to make out.

Detail test

The Sony Alpha A37's high-sensitivity, low-light performance helped it handle the still-life test well (click image to enlarge).

How well the camera copes with straight lines across the frame can only be judged in relation to the kit lens supplied, but in my tests it was excellent. The horizontal and vertical lines in the test grid run parallel, as they should, and display no evidence of barrel (bloated) or pin-cushion (pinched) distortion.

Detail test
The lens geometry test produced no evidence of barrel or pin-cushion distortion in this grid shot.

Macro performance

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Where to Buy

Sony Alpha SLT-A37 (with 18-135mm lens)

Part Number: SLTA37M
Pricing is currently unavailable.

Quick Specifications See All

  • Digital camera type SLR
  • Sensor Resolution 16.2 Megapixel