4
5
6
E-TTL Flash Ratio Control (continued)
The reverse also applies. For example, an A:B ratio of 1:4
indicates that flash B will output four times as much light
as A.
Turning off A or B (firing one tube only)
1. Press the RATIO button once. The ratio display will
appear.
2. Press either the
◄
or
►
button as needed to move
the ratio indicator all the way to the left (A) or right (B).
The ratio scale will disappear, leaving only the flash
tube firing icon for the side you have selected.
Wireless E-TTL Flash
The MR-14EX and MT-24EX are fully compatible with
the Canon Speedlite wireless flash system. Because the
MR-14EX/MT-24EX already comprise units A and B of a
wireless flash group, you would normally set any additional
unit(s) as a slave assigned to group C. Be sure to set A:B
C ratio. The Macro Lite’s A and B tubes will light the main
subject. You can use Slave C either to light the background
only or create accent lighting, according to your preference.
If you activated
FLASH C.Fn 5-1
, you can instead assign
any additional slave units to supplement slave groups A
and B.
Slaves assigned to A and B will not otherwise fire
unless C.Fn 5-1 is active.
MANUAL OPERATION
Manual Flash Mode Settings
In the manual flash mode, you can adjust the flash output
from 1/1 (full) to 1/64 power in whole-stop increments.
When shooting in manual mode you must either use a flash
exposure meter or pre-test the flash exposure. The camera
will not automatically adjust the exposure. The flash tubes
can be fired in one of three configurations:
1. Fire both flash tubes at the same output
2. Fire flash tube A at a different output from flash tube B
3. Fire only one of the flash tubes (A or B)
To fire both tubes at equal output:
1. Set the camera’s shooting mode to Av or M.
2. Press the <MODE> button and change the mode from
ETTL to M.
3. Press the <SEL/SET> button. The flash output display
will blink.
4. Press the < + > or <−> button to set the desired flash
output. Each time you press the button, the flash
output will increase or decrease by one stop.
5. Press the <SEL/SET> button again to lock in your
choice.
To fire both tubes at a different output:
1. Follow steps 1 – 2 above
2. Press the RATIO button and select A:B
3. Press the
◄
or
►
button to select flash tube A or B;
selected group is underlined
4. Press the <
+
> or <
−
> button to set the desired flash
output.
5. Press the <SEL/SET> button again to lock in your
choice, and move to next flash group
Wireless Manual Flash
To set up a wireless flash system (compatible with EOS
digital SLRs):
1. Press the Macro Lite’s <MODE> button and select
"M (Manual)".
2. Press the <RATIO> button and select
RATIO A:B
C
. Each time you press the button, the selection will
change in the following order:
OFF
→
RATIO A : B
→
RATIO A : B C
3. Press the <C H.> button to select the channel you
wish to use. Select any channel from 1 to 4. All flash
units under your control must be set to the same
channel.
Setting flash output for A and B and Slave C
With [RATIO A:B C] displayed on the master unit, set the
flash output for flash tubes A and B, then set the flash
output for slave C. For the setting procedure, refer to
“Manual Flash Mode Settings” above.
MODE-INDEPENDENT FEATURES
Modeling flash
Press the depth-of-field preview button on your camera to
trigger modeling flash. (Note: Rebel T3 requires C.Fn 8-1
be set on-camera.)
Focusing lamps
Press the LAMP button to turn on the focusing lamps. They
will automatically shut off in approximately 20 seconds. To
turn the lamps off manually, press the LAMP button again.
Flash Exposure Compensation (FEC)
You can set FEC up to ±3 stops in 1/3-stop increments (or
1/2-stop increments with some cameras). To set FEC:
1. Press the SEL/SET button repeatedly until the [+/−]
icon appears on the LCD. The icon and FEC amount
will blink.
2. Press the
+
or
–
button to set the FEC amount.
3. Press the SEL/SET button to lock in your choice.
Flash Exposure Bracketing (FEB)
Three flash shots can be bracketed up to ±3 stops in
1/3-stop increments (or 1/2-stop increments with some
cameras) in the following order: Correct exposure,
decreased exposure, and increased exposure. FEB is
canceled automatically after all three bracketed flash
exposures have been completed. To set FEB:
1. Press the SEL/SET button repeatedly until the
[BRACKETING] icon appears on the LCD. The icon
and FEC amount will blink.
2. Press the
+
or
–
button to set the FEB amount.
3. Press the SEL/SET button to lock in your choice.
Flash Sync Options
By default, the flash fires in synchronization with the first
shutter curtain when the shutter is fully open. With
Second-
curtain Sync
, the flash fires immediately before the
second shutter curtain closes at the end of the exposure.
High-Speed Sync (FP Flash)
allows the Macro Lite to
sync at all shutter speeds. Although this reduces power
output, this can be a benefit when you are working at close
distances or if you are using the flash for flash-fill lighting.
To set either option:
1. Press the <
+
> and <
−
> buttons simultaneously to
select the flash sync option of your choice. The icon
for the corresponding mode will appear on the LCD
screen as well as in your camera’s viewfinder. Each
simultaneous press of these two buttons will change
the sync setting.
2. To switch back to standard 1
st
-curtain sync, press the
<
+
> and <
−
> buttons simultaneously until neither the
2
nd
-curtain sync nor high-speed sync icons are visible
on the LCD.
