[4] This increased AF base length helps to improve focus accuracy, in particular with fast (wide aperture) lenses and in low light.

Externally, the cameras are distinguished by a recessed screen, where the K-5 had a flush-mounted one.

[6] The K-5II/IIs has a gapless design—the typical air gap is avoided by the use of a special resin—helps to reduce internal reflections and gives better visibility in bright light.

[7] The material of the screen has been changed from plastic to tempered glass, which is scratch resistant.

[10] The Pentax K-5 IIs is a version of the K-5 II which omits the traditional low pass filter for greater sharpness but potentially greater moiré.