Nikon COOLPIX 4200 User Manual - Page 32
During Recording, Getting Good Results with Autofocus, Sensitivity ISO Equivalency, AF-Assist
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Basic Photography During Recording • While pictures are being recorded to the memory or memory card, the green (AF) lamp will blink, and at the same time, a (wait) icon will be displayed in the monitor or the memory icon ( or ) will blink. Do not turn the camera off, eject the memory card, or remove or disconnect the power source while pictures are being recorded. Cutting power or removing the memory card in these circumstances could result in loss of data or in damage to the camera, internal memory, or card. Getting Good Results with Autofocus Autofocus performs best when there is contrast between the subject and the background and the subject is evenly lit. It does not perform well if the subject is very dark or moving rapidly, if there are objects of sharply differing brightness in the scene (e.g., the sun is behind your subject and their features are in deep shadow), or if there are several objects at different distances from the camera at the center of the frame (e.g., your subject is inside a cage). Sensitivity (ISO Equivalency) Sensitivity is a measure of how sensitive the camera responds to light. Your Nikon digital camera normally has a sensitivity roughly equivalent to film with an ISO 80 rating. When lighting is poor and Sensitivity ( 87) is Auto, the camera will automatically increase sensitivity, permitting faster exposures and minimizing blur caused by inadvertent camera movement (camera shake). An ISO icon will appear in the monitor to warn that the picture may be slightly mottled. AF-Assist Illuminator COOLPIX4200 is equipped with an AF-assist illuminator. If lighting is poor, the built-in AF-assist illuminator will light when the shutter-release button is pressed halfway, allowing the camera to focus even when the subject is poorly lit. The AF-assist illuminator will light in the following cases: • AF area mode is set to Auto or Off in the shooting menu, or the focus area in the center of the frame is selected when AF area mode is set to Manual. • Selecting the focus area in the center of the frame when shooting in (portrait assist) mode without using a framing guide ( 29). • Shooting in (night portrait assist) mode without using a framing guide ( 33). • Selecting the focus area in the center of the frame when shooting in (close up) mode. The AF-assist illuminator provides the following range: • Zoom out: within approx. 2 m (6'6") • Zoom in: within approx. 1.5 m (4'11") Low Battery If the flash fires when the low battery icon is displayed, the monitor will turn off while the Speedlight recharges. 22