Canon SPEEDLITE 420EX Instructions Manual page 14

meter FE Lock
'Take the picture. FE (hash exposure) lock is the lash version of AE lock. With the 420EX:
Sele en rn pele feegeel taper renee pe,
<<fno-1con i itn the viewinder, then 'utton. With FE lock you can lack the corect Rash exposure reading for
{Aim the center focusing point on
the subject where you want to
lock the flash exposure reading,
'then pross the <%> button, (28)
'nthe viewlindor, the <> icon is
'splayed
+ The 420EX fos a proftash and tho
'oquired flash exposure is locked.
+ In the viewfinder, <FEL> is displayed
Yor 0.5 see.
+ Each time you press the <>