11. A selenium cell exposure meter next to the viewfinder controls the shutter speed and aperture. 12. The non-coupled selenium cell exposure meter reads out in exposure values ( EVs ) only. 13. The M5 exposure meter can be set from ISO 6 / 9?to ISO 3200 / 36? 14. Information from the exposure meter is displayed using a dual match needle system at the bottom of the viewfinder. 15. The camera included a full-aperture TTL Cadmium-sulphide ( CdS ) exposure meter , and a bayonet lens mount of relatively large diameter. 16. This group had slightly taller top housings, with upgraded single range exposure meters and the addition of a larger, bright-line viewfinder. 17. From 1937 onwards, Brillants were made of bakelite, a polymer, and introduced an accessory compartment for an exposure meter or filters. 18. At the right-hand camera front is a wide accessory shoe taking a selenium exposure meter , which couples to the shutter speed dial. 19. The M5 exposure meter required the PX625 1.35 V mercuric oxide coin type cell which was banned because of its mercury content. 20. Due to the limited meter range, not every camera setting combination is possible to accommodate on the " Contarex I " exposure meter .