Nikon 775 - Manual (Page 99)

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Optical vs. Digital Zoom
In digital zoom, data from the camera’s image sensor are processed digitally, enlarging the
center portion of the image to fill the frame. Unlike optical zoom, digital zoom does not
increase the amount of detail visible in the picture. Instead, details visible at maximum zoom
are enlarged, producing a slightly “grainy” image . Digital zoom also differs from optical zoom
in that its effects are visible only in the monitor, not the viewfinder, meaning that the monitor
must be on before digital zoom can be used.
Restrictions on Digital Zoom
As noted above, digital zoom can only be used when the monitor is on. Digital zoom is not
available in movie mode.