How many Megapixels does the Sony A7R have?

The Sony Alpha A7R is equipped with a a full frame sensor that offers an image resolution of 36.2 megapixels (MP), or 36.2 million pixels. With its native aspect ratio of 3:2, the sensor has 7 360 horizontal pixels and 4 912 vertical pixels.

A 35mm film slide or negative contains 5-15 MP of useful detail, so that the Sony A7R can be considered to be a high-resolution camera that outresolves any 35mm film camera.

A high megapixel count makes it possible to crop any captured image substantially or to make very large prints from the image file. On the downside, large megapixel files are slower to transfer and take up more storage space on the computer harddisk. Also, high-resolution imaging requires sharper, more expensive lenses than low-res picture taking.

How large can I print with 36.2 MP?

The maximum print size of the Sony A7R for good quality output (200 dots per inch) amounts to 36.8 x 24.6 inches or 93.5 x 62.4 cm, for very good quality (250 dpi) 29.4 x 19.6 inches or 74.8 x 49.9 cm, and for excellent quality (300 dpi) 24.5 x 16.4 inches or 62.3 x 41.6 cm. Few people actually print their images that large on a regular basis, but it is nice to have the option to make very large prints of exceptional shots. Also, as mentioned earlier, a key advantage of high-MP cameras is that it is possible to crop an image ex-post and thereby, for example, change the composition of the capture or zoom in on some detail.

Sensor specs and performance

The table below compares the sensor specs of the Sony A7R to those of several similar cameras. In addition to sensor class and megapixel count, DXO values are reported as indicators of the sensor's imaging quality (higher is better). Three aspects are covered: color depth (DXO Portrait), dynamic range (DXO Landscape), 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 A7R	Full Frame	36.2	7360	4912	1080/60p	25.6	14.1	2746	95
2.		Nikon D810	Full Frame	36.2	7360	4912	1080/60p	25.7	14.8	2853	97
3.		Sony A7	Full Frame	24.0	6000	4000	1080/60p	24.8	14.2	2248	90
4.		Sony A7 II	Full Frame	24.0	6000	4000	1080/60p	24.9	13.6	2449	90
5.		Sony A7 IV	Full Frame	32.7	7008	4672	4K/60p	25.4	14.7	3379	97
6.		Sony A7C II	Full Frame	32.7	7008	4672	4K/60p	25.4	14.7	3237	96
7.		Sony A7R II	Full Frame	42.2	7952	5304	4K/30p	26.0	13.9	3434	98
8.		Sony A7S	Full Frame	12.0	4240	2832	1080/60p	23.9	13.2	3702	87
9.		Sony RX1	Full Frame	24.0	6000	4000	1080/60p	25.1	14.3	2534	93
10.		Sony RX1R	Full Frame	24.0	6000	4000	1080/60p	25.0	13.6	2537	91
11.		Sony RX1R II	Full Frame	42.2	7952	5304	1080/60p	25.8	13.9	3204	97
Note: DXO values in italics represent estimates based on sensor size and age.

In the United States, the A7R was initially launched in October 2013 at a price of $2,299.

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Camera to camera comparisons

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