1. Matthews claimed that he had created a remote control system that used selenium cells . 2. Built-in light metering with SLRs started with clip-on selenium cells meters. 3. A selenium cell exposure meter next to the viewfinder controls the shutter speed and aperture. 4. The non-coupled selenium cell exposure meter reads out in exposure values ( EVs ) only. 5. Although the selenium cell photometer was proving successful, it was difficult to use and not very sensitive. 6. The camera existed in two versions, one with a selenium cell and one with a Cds cell. 7. While the selenium cell area was big, the add-on made the camera look clumsy and unattractive. 8. In its ultimate electronic form, the photophone receiver used a simple selenium cell at the focus of a parabolic mirror. 9. Frustrated by its use, he worked with F . C . Brown to develop a photometer based on a selenium cell . 10. The selenium cell exposure meter is now coupled to a " setting wheel " located on the very bottom of the lens mount.
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