Sensors  >  Sony SLT Alpha 37  >  Sensor Test Results

Sony SLT-A37 Preview


Equipped with translucent mirror technology, the Alpha 37 does not have an optical viewfinder, but rather a 1440-million-point electronic viewfinder. The system permits “reflex” autofocus phase detection in video mode, thus LiveView during video recording, as well as being able to see in the viewfinder the impact of various settings (white balance, exposure, depth of field, etc.).

Sony SLT A37 front

This new generation of entry-level digital reflex SLT cameras keeps the famous 16Mpix APS-C Exmor sensor, known for its excellent behavior at high sensitivities and in low-light, and for its high dynamic range. But the SLT-A37 is confined to a range of sensitivities that go from 100 to 16,000 ISO, whereas its predecessor went up to 25,600 ISO. It should be said that translucent mirror technology consumes part of the light that enters through the lens and thus results in a slight degradation of the camera’s sensitivity with respect to such other cameras as compact hybrids (for example, the NEX-F3 also announced today and equipped with the same sensor as the Alpha 37).

Sony SLT A37 front

The principal strengths of the Sony Alpha 37 reflex

  • A powerful 16Mpix APS-C sensor
  • A 15-point autofocus (with three cross collimators) — better than most inexpensive reflex cameras
  • Full HD video mode, 1920×1080 pixels at 50i or 50p with an external microphone jack 
  • Integrated sensor stabilization that allows the camera to use all compatible lenses 
  • A burst mode rate of 7 i/s with subject tracking
  • A tiltable screen — but a rather small one (2.7 inches) with weak (230,000-point) resolution (it is, after all, a reflex camera that costs only 500 euros…)
  • Superior Auto mode, automatic portraiture and sweep panoramic photos
  • Available in a kit with the new SAL 18–135mm f/3.5-5.6 SAM lens, the equivalent of a 27–200mm on the SLT-A37
Sony SLT A37 back

An intelligent digital lens doubler

The Sony SLT-A37 can artificially double the focal length of a lens by cropping the image center, while limiting loss of image quality. Sony’s “By Pixel Super Resolution” technology extrapolates the image by attempting to reestablish the resolution, the details, and the subject. This type of process has been used in digital compact cameras for quite some time; now it has arrived for reflex cameras. This lightweight digital 2x doubler can help photographers avoid hauling around lenses while traveling.

Portrait auto-framing

Many amateur photographers amateurs aren’t very successful shooting portraits for lack of proper framing. The Alpha 37 combines the intelligence of face detection with the “rule of thirds” (the golden ratio of photo composition), to come up with an optimal shot. To achieve this, however, the camera itself whittles down the image, although its By Pixel technology preserves some of the image quality.

Sony SLT-A37: price and availability

The Sony SLT-A37 comes on the market this month (May 2012). It will be sold for 500 euros (body only), but also comes in three kits :

  • Sony A37 + 18–55mm lens: 600 euros
  • Sony A37 + 18–135mm lens: 800 euros
  • Sony A37 + 18–55mm + 55­–200mm lenses: 800 euros

The kit composed of the Alpha 37 reflex camera body and the brand-new Sony SAL 18­–135mm lens, the world’s lightest at only 398 grams, is of particular interest for its multi-purpose use. The SLT-A37 body alone is 100 euros less expensive and better than its predecessor.

Principal technical characteristics of the Sony SLT-A37

  • 16Mpix APS-C Exmor sensor
  • Integrated sensor image stabilization
  • Sensitivity: 100 to 1600 ISO
  • 15-point autofocus (with three cross collimators)
  • Shutter: 1/4000s at 30s and pose B
  • Integrated flash: guide number 10
  • Synchronized flash: 1/160s
  • Full HD video with active autofocus
  • Burst shooting rate: 7 i/s
  • Processor: BIONZ
  • iAuto and Superior Auto scene recognition modes
  • PSAM modes 
  • 2D and 3D sweep panoramic shooting
  • Creative effects 
  • D-Range Optimizer
  • 1,440,000-point electronic viewfinder, 100% coverage and 1.04x magnification
  • TFT 2.7-inch / 230400-points screen, tiltable (135° top and 55° bottom)
  • Outputs: USB 2.0, mini-HDMI
  • Inputs: microphone jack, remote jack 
  • 448 grams (without battery and memory card)
  • Autonomy: 500 shots

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