Sony Alpha 77

	Sony α77
Type:	SLT camera (single-lens translucent)
Lens :	see camera versions
Lens connection :	Sony Minolta A bayonet
Image sensor :	CMOS
Sensor size:	APS-C (23.5 mm × 15.6 mm)
Resolution :	24.3 megapixels
Image size:	6,000 × 4,000 pixels
Format factor :	1.5
Aspect ratio :	3: 2, 16: 9
File formats :	JPEG , ; RAW , ; 3D MPO
Exposure index :	100 to 16,000, ; expandable to 50 to 25,600
Release delay :	0.08 s with manual focus to 0.39 s with autofocus in low light
Viewfinder :	OLED electronic viewfinder
Field of view :	100%
Enlargement:	1.09 compartment
Viewfinder display:	1024 × 768 pixels (786,432 pixels, XGA )
Screen :	3-way swiveling LCD
Size:	7.5 cm (3.0 in)
Resolution:	640 × 480 pixels (307,200 pixels), 288 ppi
Operating modes:	Single image, series shots, self-timer , bracketing series, swivel panoramas, video recordings
Frame rate :	Max. 14 frames / s
Auto focus (AF) :	TTL
AF points:	19 points (11-point cross type)
AF measuring range:	-1 EV to 18 EV
AF modes:	Single-frame autofocus, automatic autofocus, continuous autofocus
Exposure metering :	"Exmor" CMOS sensor
Measuring range:	1,200-zone selective measurement
Regulation:	Multi-field metering, center-weighted Measurement, spotmod
Correction :	± 5.0 EV
Closure :	Electronically controlled vertical focal plane shutter
Shutter speed :	30-1 / 8000 s and Bulb
Lightning :	Auto pop-out flash
Guide number :	12 GN at ISO 100
Flash control:	TTL flash metering
Lightning connection :	Yes
Synchronization :	1/250 seconds
Exposure compensation :	± 3.0 EV
Flash functions:	Auto flash, fill-flash, slow sync, sync on 2nd curtain high speed sync
Color space :	sRGB , Adobe RGB
White balance :	automatically or manually
Storage media :	SD , ; SDHC , ; SDXC , ; MemoryStick Pro Duo
Data interface :	USB 2.0 Hi-Speed
Video interface:	HDMI (1080p)
Direct printing:	Exif Print, PRINT Image Matching III
Power supply:	NP-FM500H lithium-ion battery
Casing:	Magnesium alloy
Dimensions:	142.6 mm × 104.0 mm × 80.9 mm
Weight:	653 grams (without battery and other accessories)
Additions:	Integrated GPS

The Sony α77 ( SLT-A77V , SLT-A77 ) is a SLT camera ( single-lens translucent ) - a digital camera similar to a DSLR camera . The camera is the successor of the α700 and the predecessor of the almost identical Sony Alpha 77 II . At the time of the market launch (October 2011 in Germany) it was Sony's top model with APS-C sensor. Like the Sony α55 and Sony α33 , which were released in autumn 2010, the camera does not have a conventional folding mirror, but a partially transparent mirror and an electronic viewfinder.

Available camera versions

Sony A77 with fold-out flash, clip-on shoe, with Sony and Carl Zeiss lenses

Version designation	lens	Other Accessories
SLT-A77VK	DT 18-55mm SAM F / 3.5-5.6	NP-FM500H battery, BC-VM10 battery charger; Shoulder strap, USB cable, software CD
SLT-A77VQ	DT 16-50mm F / 2.8 SSM	NP-FM500H battery, BC-VM10 battery charger; Shoulder strap, USB cable, software CD
SLT-A77V	without lens	NP-FM500H battery, BC-VM10 battery charger; Shoulder strap, USB cable, software CD

In some countries the Sony Alpha 77 is delivered without GPS, in which case the letter V is omitted in the version designation. Shortly after the market launch, various bundles of camera bodies with various Sony and Zeiss lenses that differed from the basic range were offered in European retailers.

Furnishing

The camera has a CMOS sensor APS.C with 23.6 × 15.8 mm, which enables the camera to have an effective resolution of 24.3 megapixels with an adjustable 350 dpi and a color depth of 36 bits. The two file formats JPG and RAW can be triggered together or individually. The JPG format can also be selected in a lower resolution, but RAW is only 24 megapixels. The electronic viewfinder measures 1.3 cm and offers 100% image coverage with 786,432 pixels, each consisting of three sub-pixels of the color channels red, green and blue. The viewfinder brightness adjusts itself automatically to the ambient light conditions of the subject. The viewfinder adjustment options range from −4 to +3 dioptres. The TFT monitor (7.5 cm), which can be swiveled in two axes, offers a resolution of 640 × 480 pixels. The Sony A77 has another display (LCD) on the top, which shows information such as aperture size, ISO value and exposure time. The handling of various settings has been made easier by a second dial on the front of the camera in addition to the rear dial. Like many professional cameras, it can be controlled using a remote control. For sale in the German-speaking area, the basic version of the camera has a switchable Global Positioning System (GPS) that inserts the GPS position data longitude, latitude and, as a special feature, the altitude (altitude value) directly into the EXIF data. A powerful, intelligent flash system can be folded out (expandable at Sony for "unleashed flash"); The built-in flash is not installed high enough when folded out to be able to easily avoid all shading with longer or very voluminous lenses or attached lens hoods. A so-called hot shoe is available for slip-on accessories, for which Sony also supplies a hot shoe adapter for other systems. When using the Sony portrait format grip (a well-equipped battery grip), not only are the shutter release button and the on / off switch available again, but also some of the essential controls (for practicable portrait format photography), which are otherwise only found on the back of the camera are.

Differences to the α65

The Sony α77 was released together with the Sony α65. The main differences are:

	Sony α77	Sony α65
casing	Magnesium-aluminum alloy	plastic
Autofocus	19 AF sensors, 11 of which are cross-type	15 AF sensors, 3 of which are cross-type
Exposure time	1 / 8000–30 s ( Bulb mode up to 4 hours) Flash sync time 1/250	1 / 4000–30 s (bulb mode up to 4 hours) Flash sync time 1/160
Burst speed	12 frames / s	10 frames / s
Display	3-way tilting display	2-way tilting display
particularities	LC display on the top of the housing Dust and splash-proof housing Synchronous socket for connection to studio flash systems An official vertical handle is available as an option. 2 adjustment wheels and more buttons

equipment

Sony SLT-A77 via adapter with Zeiss Hasselblad S-Planar lens with a fixed focal length of 120 mm for (semi) professional tasks.

Sony and Zeiss lenses with A-mount
Vertical format handle (VG-C77AM) with space for two batteries (the space of the battery compartment in the body is occupied by the vertical format handle).
Rechargeable battery (NP-FM500H)
Flash units and lights
Microphones
Viewfinder & Monitors
various third-party adapters for connecting lenses from other manufacturers

Web links

Commons : Sony SLT-A77 - collection of pictures, videos and audio files

Individual evidence

↑ Sony (along with other manufacturers) counts the subpixels of each pixel, i.e. H. the red, green and blue channels of each pixel individually, and therefore specifies the viewfinder display with 786,432 [pixels] × 3 [color channels] = 2,359,296 pixels.
↑ Sony (along with other manufacturers) counts the subpixels of each pixel, i.e. H. the red, green and blue channels of each pixel individually, and therefore specifies the rear display with 307,200 [pixels] × 3 [color channels] = 921,600 pixels.
↑ Technical data of the Sony SLT-A77V

[1] Sony (along with other manufacturers) counts the subpixels of each pixel, i.e. H. the red, green and blue channels of each pixel individually, and therefore specifies the viewfinder display with 786,432 [pixels] × 3 [color channels] = 2,359,296 pixels.

[2] Sony (along with other manufacturers) counts the subpixels of each pixel, i.e. H. the red, green and blue channels of each pixel individually, and therefore specifies the rear display with 307,200 [pixels] × 3 [color channels] = 921,600 pixels.

[3] Technical data of the Sony SLT-A77V