While Sony Alpha 7 features a 24.3 effective megapixels Exmor CMOS sensor, the Alpha 7R features a 36.4 effective megapixels Exmor CMOS sensor.

Both cameras share certain common features like they have been given front and back dials, nine customisable buttons and 46 assignable functions, plus a control wheel and exposure compensation.

Apart from this, both the cameras are equipped with fast AF capabilities, a clear XGA OLED Tru-finder, full HD 60p recording, Wi-Fi and NFC connection, dust and moisture resistance.

The company claims that the Exmor CMOS sensor in both cameras incorporates 'light concentration and photo diode expansion technologies'.

The Alpha 7 and 7R are different not only in terms of construction but also have different sensor and autofocus. While the Alpha 7 is meant more for advanced amateurs, the Alpha 7R is apt for professionals.