Nikon 1713 Instruction Manual - Page 22

C O L U M N About Metering Systems and Exposure Metering systems and exposure are important factors for taking pictures. Knowing the characteristics of each factor helps you widen your photographic expression. •Metering Systems As the proper combination of shutter speed and aperture for correct exposure is determined according to subject brightness and film sensitivity, measuring subject brightness is very important. In general, brightness inside the viewfinder is not uniform. The F65/F65D provides two metering systems: Matrix Metering (page 28) and CentreWeighted Metering (page 58). With Matrix Metering, data on scene brightness is detected by the six-segment Matrix sensor. With CentreWeighted Metering, most of the meter's sensitivity is concentrated on the 12mm-diameter centre circle in the viewfinder. With the F65/F65D, Matrix Metering is automatically selected when the exposure mode is set to other than Manual and Centre-Weighted Metering is selected with Manual exposure mode. Using D- or G-type Nikkor lenses, the F65/F65D camera performs 3D Matrix Metering by adding distance information to determine correct exposure. • Exposure Light from the subject passes through the lens and exposes the film. Light reaching the film is controlled by the shutter speed and aperture. The proper combination of shutter speed and aperture for subject brightness and film sensitivity results in the correct exposure. The F65/F65D's AUTO mode (page 51), Auto-Multi Program (page 52) and Vari-Program (page 36) automatically control shutter speed and aperture. In Shutter-Priority Auto exposure mode (page 54), you can manually set shutter speed and the camera automatically sets the proper aperture. In Aperture-Priority Auto exposure mode (page 56), you can manually set aperture and the camera automatically sets the proper shutter speed. In Manual exposure mode (page 58), you manually set both shutter speed and aperture. C O L U M N 42 DETAILED OPERATION This section features detailed descriptions of camera functions and advanced operations. • Focus mode • Focus area • AF-Assist Illuminator • Focus lock • Shooting in each exposure mode • Exposure Compensation • Auto Exposure Bracketing • Multiple Exposure • Film rewind • Dioptre adjustment/Viewfinder accessories • Depth-of-field preview • Remote control operation (optional) • Available mode combinations 43