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Sony Alpha A77 review

24Mp and a groundbreaking viewfinder, bring it on!

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.

JPEG Signal to noise ratio

Sony alpha 77 review signal to noise ratio
Sony alpha 77 review: signal to noise ratio

JPEG images from the Sony Alpha 77 show signal to noise ratio results that are on par with the Canon EOS 7D and Pentax K-5. These results show that noise is well controlled up to a sensitivity of ISO 3200, above this sensitivity value noise starts to become more apparent, but images still have lots of detail.

Raw signal to noise ratio

Sony alpha 77 review tiff signal to noise ratio
Sony alpha 77 review: tiff signal to noise ratio

Raw images (after conversion to TIFF) from the Sony Alpha 77 have a better signal to noise ratio than the Canon EOS 7D and Nikon D300s. Although the Pentax K-5 has a slightly better score, the difference is marginal.

JPEG dynamic range

Sony alpha 77 review dynamic range
Sony alpha 77 review: dynamic range

This chart shows that the Sony Alpha 77's JPEGs capture a wide tonal range up to a sensitivity of ISO 3200, at ISO 6400 the amount of tonal detail captured in the shadows and highlights deteriorates. This graph shows that from a sensitivity of ISO 100 to 1600 the Sony Alpha 77 JPEGS capture a greater tonal range than the Canon EOS 7D and the Nikon D300s, which is impressive given its higher pixel count.

Raw dynamic range

Sony alpha 77 review tiff dynamic range
Sony alpha 77 review: tiff dynamic range

This chart shows that the Sony Alpha 77's raw images (after conversion to TIFF) capture a wide tonal range up to a sensitivity of ISO 6400, beating the Canon EOS 7D and Nikon D300s by as much as 2Ev. At the higher end of the sensitivity range the Pentax K-5 just has the edge.

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

Tech Specs

Product TypeDigital SLT Camera with Lens
Battery Size SupportedProprietary Battery Size
Green CompliantYes
Maximum Video Resolution1920 x 1080
Effective Camera Resolution24.3 Megapixel
GPSYes
USBYes
HDMIYes
Wide AngleYes
PictBridgeNo
Product Familyalpha A
HD Movie ModeYes
Memory Card SupportedMemory Stick PRO Duo, Memory Stick PRO-HG Duo, Secure Digital (SD) Card, Secure Digital High Capacity (SDHC) Card, Secure Digital Extended Capacity (SDXC), Eye-Fi Card
Image StabilizationOptical
ColourBlack
Optical Zoom3.1x
Digital ZoomNo
Brand NameSony
FeaturesLive View, Self-timer, Face Detection, Smile Detection, Continuous Shooting Mode, 3D Panorama
Screen Size7.6 cm (3")
Video FormatsMPEG-4 AVC, AVCHD
Viewfinder TypeElectronic
Weight (Approximate)653 g
Green Compliance Certificate/AuthorityWEEE
Image Sensor Size23.50 mm x 15.60 mm
Maximum Image Resolution6000 x 4000
Display Screen TypeLCD
Height104 mm
Width142.6 mm
Depth80.9 mm
Product SeriesA
Focal Length16 mm to 50 mm (Lens 1)
Image FormatsJPEG, RAW, MPO
Focus ModesAuto, Manual
ManufacturerSony Corporation
Product ModelSLT-A77
Product NameA77 Translucent Mirror Interchangeable Lens Camera
Product Linealpha
Exposure Control
  • Program AE
  • Aperture Priority AE
  • Shutter Priority AE
  • Manual
Aspect Ratio16:9
Manufacturer Part NumberSLTA77VQ.CEH
Manufacturer Website Addresshttp://www.sony.co.uk
Marketing Information

Step up to new levels of imaging quality, performance and handling to meet the demands of serious photo enthusiasts. Capture flawless images and Full HD video, with class-leading responsiveness and immense creative control.

Package Contents
  • A77 Translucent Mirror Interchangeable Lens Camera
  • BC-VM10A Battery Charger
  • Power Cord
  • Rechargeable Battery Pack NPFM500H
  • USB Cable
  • Shoulder Strap
  • Body Cap
  • Accessory Shoe Cap
  • Eyecup
  • CD-ROM
  • Instruction Manual
  • SAL-1650 Lens
  • Front Lens Cap
  • Rear Lens Cap
  • Lens Hood
Limited Warranty1 Year