Pentax's early SLR — the Asahiflex IIA, added slow shutter speeds, screw mount, 1955.
The Asahiflex IIA arrived in 1955 as a companion to the IIB in Asahi Optical's early Japanese SLR line. It added slow shutter speeds to the range, broadening the camera's usefulness in lower light. Like its siblings it predates the Pentax name and the eye-level pentaprism, and it belongs to the founding Asahiflex family that led to the Spotmatic and K-mount cameras.
This is a 35mm film SLR with the screw lens mount that became the M42 standard, using Asahi's screw-thread lenses. It has a horizontal cloth focal-plane shutter with an extended range of slow speeds compared with earlier models, and it is viewed through a waist-level reflex finder rather than a prism. There is no built-in meter, so exposure is set by hand, and the body is fully mechanical, firing without a battery. It carries the instant-return mirror introduced on the IIB.
The IIA suits collectors and photographers who enjoy the deliberate pace of early SLR shooting. The wider slow-speed range makes it a little more flexible than the IIB, but waist-level viewing and manual exposure keep it firmly in the slow-and-considered category. It works best as a display piece with occasional careful use rather than as a daily camera.
Being a mid-1950s body, careful checks matter. Look over the cloth shutter for pinholes and even movement, and test the slow speeds specifically, as these often run sticky on old bodies. Confirm the instant-return mirror returns cleanly. There is no meter or battery to consider. Check the waist-level ground-glass for haze or fungus and test the advance and rewind. Clean period screw-mount lenses determine how usable the outfit will be.