The Pentax K2 was the flagship model of the camera trio Pentax introduced in 1975 featuring the new K lens mount developed for Zeiss. K2 features aperture priority automatic exposure, selected by the accordingly marked shutter speed dial position. The camera selects the proper shutter speed between 1/1000th and 8 seconds when the shutter release is depressed. Other notable features on the K2 are the mirror lockup, and that the shutter speeds from 1/125 sec. to 1/1000 sec. and 'B' works without battery power.
Self-timer (5 to 9 sec.)
Auto exposure (aperture priority)
Exposure compensation (4×, 2×, 1×, ½×, ¼×)
Shutter speeds down to 8 seconds, flash sync at 125th/sec
Manual Mechanical shutter: 1/125 to 1/1000 sec and B