various other models were produced such as the kine-exakta, the exakta ii, the exakta varex (featuring an interchangeable pentaprism eye-level viewfinder and identified in the united states as the 'exakta v'), the exakta varex vx (identified in the united states as the 'exakta vx'), the exakta vx iia, the exakta vx iib, the exakta vx500 and the exakta vx1000. ihagee also manufactured less expensive cameras under the 'exa' camera label such as the exa, the exa ia, the exa ii, the exa iia, the exa iib (which was generally not considered part of the "official" exa line), and the exa 500. the exacta sold well and triggered other camera manufacturers to develop 35mm slrs. sales were particularly strong in the medical and scientific fields. a large range of lenses and accessories were made by a variety of manufacturers, turning the camera into one of the first system cameras−-although motor drives and bulk loading backs were never produced by ihagee.