Nikon SB 20 - Confirming Focus Lock and Taking Shot

3. Lightly press camera shutter release
button.
When ready-light comes on but ambient light is insuffi-
c
ie nt for autofocus operation, AF illuminator fires to
start autofocus operation.
If ambient light is sufficient, the AF illuminator does not
fi r e.
16
4 Confirm whether the green in·focus
• indicator LIFO lights up, then fully depress
the shutter release button.
If focus-not-possible indicator LED ( x) remains lit
when using the Nikon F-50llN2020, or if focus indi-
cator
LED (e) blinks with Nikon F-401/N4004, auto-
focus flash photography
is impossible. Focus manually
on the clear matte field.