Sony Alpha a58 review

DSLT merges two beginner lines

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We shoot a specially designed chart in carefully controlled conditions and the resulting images are analysed using DXO Analyzer software to generate the data to produce the graphs below.

A high signal to noise ratio (SNR) indicates a cleaner and better quality image.

For more more details on how to interpret our test data, check out our full explanation of our noise and dynamic range tests.

Here we compare the Sony a58 with the Sony a57, Canon EOS 650D and Nikon D3200.

JPEG signal to noise ratio

Sony Alpha a58 review

These results show that JPEGs from the Sony a58 contain reasonable signal to noise ratios, outperforming images from the Canon EOS 650D and Nikon D3200 at every sensitivity setting above ISO 400. The Sony a58's JPEG images contain similar signal to noise ratios to the Sony a57's at lower to mid sensitivities, but the newer camera's images are stronger at ISO 3200 and above.

Raw signal to noise ratio

Sony Alpha a58 review

Signal to noise ratios of the TIFF images (after conversion from raw) from the Sony a58 are much weaker than the JPEGs, relatively speaking, this time performing worse than those from the Sony a57 and Canon EOS 650D at every sensitivity setting, and worse than the Nikon D3200 at every setting except ISO 6400 and 12800.

JPEG dynamic range

Sony Alpha a58 review

As we can see from this chart, the Sony a58's JPEGs show greater dynamic range than the Canon EOS 650D's at every sensitivity but ISO 1600 and 3200. The a58's JPEGs show similar levels of dynamic range to the Nikon D3200 at ISO 100, 200, 1600 and 6400, but the a58 is stronger at other sensitivities. The a58's JPEGs contain similar dynamic range to the Sony a57's at ISO 100 and 200, then the a57's images are stronger from ISO 400 to ISO 6400, but the a58's overtake at the top of the sensitivity range.

Raw dynamic range

Sony Alpha a58 review

TIFF images (after conversion from raw) from the Sony a58 contain greater dynamic range than those from the Canon EOS 650D at ISO 100-800, after which point the scores are very similar. The a58's TIFFs show a similar dynamic range to the Sony a57 and Nikon D3200 at ISO 100 and 200, but after that they fall behind both cameras, only beating the Nikon briefly, at ISO 6400.

Tech Specs

Product TypeDigital SLT Camera with Lens
Battery Size SupportedProprietary Battery Size
Maximum Video Resolution1920 x 1080
Effective Camera Resolution20.1 Megapixel
Product Familyalpha
HD Movie ModeYes
Memory Card SupportedMemory Stick PRO Duo, Memory Stick PRO-HG Duo, Memory Stick PRO-HG HX Duo, Secure Digital (SD) Card, Secure Digital Extended Capacity (SDXC), Secure Digital High Capacity (SDHC) Card, Eye-Fi Card
Image StabilizationOptical
Optical Zoom3.1x
Brand NameSony
FeaturesFace Detection, Noise Reduction, Live View, Continuous Shooting Mode, External Flash Shoe, Smile Detection
Screen Size6.9 cm (2.7")
Video FormatsAVCHD, MPEG-4 AVC, MP4
Viewfinder TypeElectronic
Weight (Approximate)492 g
Image Sensor Size23.50 mm x 15.60 mm
Maximum Image Resolution5456 x 3632
Display Screen TypeLCD
Height95.5 mm
Width128.6 mm
Depth77.7 mm
Focal Length18 mm to 55 mm (Lens 1)
Image FormatsJPEG, RAW
External FlashOptional
Focus ModesManual, Auto
ManufacturerSony Corporation
Product Modela58
Product Namea58 Camera and 18-55mm Lens
Product Linealpha
Exposure Control
  • Program AE
  • Aperture Priority AE
  • Shutter Priority AE
  • Manual
Aspect Ratio16:9
Manufacturer Part NumberSLTA58K
Manufacturer Website Address
Marketing Information

Advance your images with the creative freedom of interchangeable-lens DSLR photography. The Sony Alpha a58 SLT-A58K camera combines innovative technologies with user-friendly features for intuitive handling and impressive quality. The 20.1-megapixel Exmor HD APS sensor delivers richly-detailed images with a truly professional look. Combined with Sony CMOS technology, the a58 achieves high resolution and excellent low-light performance with reduced noise. Thanks to award-winning Translucent Mirror Technology, you'll be able to shoot and focus simultaneously for ultimate speed and precision. Lock-on AF helps guarantee tack-sharp photos, even when shooting quick-moving subjects. And with a wide range of sensitivity-from ISO 100 all the way to ISO 16000-your photos and Full HD video will shine with noticeable clarity and reduced graininess, even in challenging lighting conditions. Includes an 18-55mm f/3.5-5.6 zoom lens.