Olympus OM-2, zm2000qdk manual Depth of Field Scale Preview Button

DEPTH OF FIELD SCALE PREVIEW BUTTON

The double series of numbers engraved on the

depth of field scale represents F stops: F4, F8, and F16. Once you have focused on your subject,

all objects within the distance range indicated on the lens distance scale between the marks for the F stop you have selected will have acceptable sharpness. For example, in the above picture, the camera-to-subject distance is 3m (10ft.) and the lens is set at F16. If you read the distance scale at the points opposite the engraved "16" on both

sides of the reference dot, you will find that the

depth of field is from 1.9m (6ft.) to 7m (23ft.).

When you wish to see which objects fall within

the acceptable zone of sharpness (depth of field),

press the preview button on your lens. The dia- phragm of the lens will stop down to the preset

F stop enabling you to see the depth of field in the viewfinder.

CAUTION: If you jerk the preview button while depressing the shutter release button halfway

down the shutter might be released.

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