Flash Coverage - Canon SPEEDLITE 420EX Instructions Manual

Flash Coverage =
'The 4206's flash head zooms automatically to provide adequate flash
'coverage forthe lons focal length in use. Flash coverage Is provided for the
'24mm to 105mm focal lengths. The corresponding autozoom position
Indicator on the Speedite lights.
'When a zoom lens i used, the flash coverage changes automatically to
'uit the focal length you z00m to,
Press the shutter button halfway.
+ The autozoom positon indicator for
the corresponding lens focal length
(8 - wan the tah coverage changot. te Sesotes Gus No, ako charons
See Guide Ns, on page 89 wo how bw Gude No, angen
"Ht the lane focal kangth is 105mm oF longer, te 105 auiozoom postion indicator ;
hth ees ste at a
'es eet 2 SLATE (oh. ah cme
AF-Assist Beam
It where you focus lacks sutfcent ight or contrast. the 420EXs AF-assist
'beam is emited automatically so thatthe camera can autofocus. The AF-
'assist beam can cover the focusing points of the EOS 90ELAN 7E and
'almost all other EOS cameras, The AF-assist beam is etfective from 0.7 to
7 m2.3 to 231. al the center focusing point.
AF-Assist Beam Preconditions
'The preconditions for the AF-assist beam to be emited are explained on
page Si.
16
When the 4206X is mounted on a Type
'Acamera such as the EOS 30/ELAN
7E, using E-TTL autolash is just as
easy as normal autoerposure (AE).
E-TTL autofiash uses the camera's
rmull-zone metering sensor for highly
precise flash exposure contol. A
'ratiash's ted lor evaluative Nash
metering and the reading is used 10
<eterming the main flash output, The
result isa flash picture with excellent
'balance between the flash tumination
'and ambvent light
(Bl «Tm secton uses he EOS 20ELAN TE a8 he
pene
lore poseecrg tet un on he maint on feces an DEX.
Sete its nrosse sec <OFF>,
SESESE ELAN Tee ner EOS ELAN Econ