Pentax KX

The upper model to the KM in the range, added a mirror locking possibility, a lock for the release button, and a window to see the aperture in the viewfinder (at the top of the frame). The choice of the film speed is no more on the shutter speed selector, but around the rewind button. In the viewfinder, a needle is positioned in front of the selected speed, you have to align with it the needle of the meter. The powering of the lightmeter is a bit special: it is first necessary to pull the cocking lever, then press the shutter button halfway. The meter shuts down when you push the lever back. Power: 2 x 1.5v batteries, PX76 like.