The Exa IIa is a 35 mm SLR camera made by Ihagee in 1963-4.
It is a upgrade of the Exa II and it featured a fixed pentaprism with either a ground glass or split-image in the center of the viewfinder. The film advance was also shortened in the IIa from 180 to 90 degrees.
As in the Exa II, the shutter is a vertical-travel cloth Focal Plane shutter, with speeds from 1/250-1/2 and B. A shutter lock button can be used to keep the shutter open for long exposures in lieu of a cable.
The mirror is not instant return, and only goes down when the shutter is cocked.
It is similar to the Exa II, but has the sloped ends to the top housing of later Exas. It has the standard Exacta bayonet lens mount and lever film advance. It does not have a hinged back; for loading, the back and base of the camera detach completely. Like many Exacta cameras, authorities recognize sub-types; however, McKeown only identifies a type 1 without strap lugs, and type 2 with them.