How much dynamic range does the Sony A77 offer?

According to measurements carried out by DXO Mark, the sensor in the Sony Alpha SLT-A77 provides a maximum of 13.2 EV of dynamic range (DR). DR is defined as the ratio between the highest and lowest brightness a camera can capture. A value of 12 EV or above is considered excellent.

High dynamic range of a camera sensor is particularly desirable for scenes with a mix of very bright and very dark parts, such as in some landscape photography settings. It helps to avoid that highlights get washed out or that detail in shadows is lost.

Sensor specs and performance

The table below compares the sensor specs of the Sony A77 to those of several similar cameras. The reported DXO values are indicators of the sensor's imaging quality (higher is better). In addition to dynamic range (DXO Landscape), the listing also covers color depth (DXO Portrait) and high-ISO noise (DXO Sports). Larger sensor cameras tend to outperform cameras of the same generation that are equipped with a smaller imager. On the other hand, larger sensors are more expensive and require bigger and heavier lenses than smaller light receptors.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Sony A77	APS-C	24.0	6000	4000	1080/60p	24.0	13.2	801	78
2.		Canon 6D	Full Frame	20.0	5472	3648	1080/30p	23.8	12.1	2340	82
3.		Panasonic GH5	Four Thirds	20.2	5184	3888	4K/60p	23.9	13.0	807	77
4.		Pentax K-3	APS-C	24.1	6016	4000	1080/60i	23.7	13.4	1216	80
5.		Sony A6600	APS-C	24.0	6000	4000	4K/30p	23.8	13.4	1497	82
6.		Sony A9	Full Frame	24.0	6000	4000	4K/30p	24.9	13.3	3517	92
7.		Sony A6500	APS-C	24.0	6000	4000	4K/30p	24.5	13.7	1405	85
8.		Sony A68	APS-C	24.0	6000	4000	1080/60i	24.1	13.5	701	79
9.		Sony A7 II	Full Frame	24.0	6000	4000	1080/60p	24.9	13.6	2449	90
10.		Sony A77 II	APS-C	24.0	6000	4000	1080/60p	24.4	13.4	1013	82
11.		Sony A99	Full Frame	24.0	6000	4000	1080/60p	25.0	14.0	1555	89

In the United States, the A77 was initially launched in August 2011 at a price of $1,399.

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Camera to camera comparisons

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