Nikon F4 - Manual (Page 97)

•While exposure is locked, “EL” appears in the viewfinder.
• In Single Servo AF mode, before releasing shutter, be sure to
refocus by briefly removing your finger from the shutter re­
lease button and lightly pressing again to reactivate autofo­
cus function.
• Simultaneous use of AF-L (Autofocus Lock) button is recom­
mended. In this case, turn AF-I7AE-L simultaneous lock lever
to (••) and press AF-L button.
•This works best with either the Center-Weighted or Spot
Metering system; with Matrix Metering, exposure compensa­
tion is automatic.
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