Nikon F3AF Stop-Down Exposure Measurement, For non·Allenses with automatic diaphragms

Stop-Down Exposure Measurement

When using a non-AI lens or certain close-up accessories, you must push the meter coupling lever release button @ and lock the meter coupling lever 4 in the "up" position before mounting a lens or attaching an accessory. In this case, the diaphragm in the lens does not link with the meter coupling lever on the camera body. Therefore, you must perform stop-down metering. The procedure is as follows :

For non·Allenses with automatic diaphragms

On auto: Push the depth-of-field preview button ® all the way in and hold it as you trip the shutter.

Caution: If the depth·of-field preview button is not depressed all the way, the mirror 9 may remain in the " up " position.

On manual : Select a shutter speed. Then hold in the preview button and turn the lens aperture ring @ until the - + symbol appears in the viewfinder. Release the preview button and take the shot.

For non·Allenses or accessories without automatic diaphragms

On auto: Stop the lens down manually until the desired shutter speed appears in the viewfinder. Then take the picture.

On manual: Adjust the shutter speed or aperture until the - + sign appears .

For fixed·aperture lenses, photomicrography, or astrophotography

On auto: No control is necessary; just take the picture.

On manual: Adjust the shutter speed dial until the - + appears. If correct exposure is unobtainable, use an NO (neutral density) filter or change the illumination to adjust the exposure.

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