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E-TTL Flash Ratio Control (continued)
The reverse also applies. For example, an A:B ratio of 1:4
indicates that ash B will output four times as much light
as A.
Turning off A or B (ring 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 ash
tube ring 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 ash system. Because the
MR-14EX/MT-24EX already comprise units A and B of a
wireless ash 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 re
unless C.Fn 5-1 is active.
MANUAL OPERATION
Manual Flash Mode Settings
In the manual ash mode, you can adjust the ash output
from 1/1 (full) to 1/64 power in whole-stop increments.
When shooting in manual mode you must either use a ash
exposure meter or pre-test the ash exposure. The camera
will not automatically adjust the exposure. The ash tubes
can be red in one of three congurations:
1. Fire both ash tubes at the same output
2. Fire ash tube A at a different output from ash tube B
3. Fire only one of the ash tubes (A or B)
To re 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 ash output display
will blink.
4. Press the < + > or <−> button to set the desired ash
output. Each time you press the button, the ash
output will increase or decrease by one stop.
5. Press the <SEL/SET> button again to lock in your
choice.
To re 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 ash tube A or B;
selected group is underlined
4. Press the < + > or <−> button to set the desired ash
output.
5. Press the <SEL/SET> button again to lock in your
choice, and move to next ash group
Wireless Manual Flash
To set up a wireless ash 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 ash
units under your control must be set to the same
channel.
Setting ash output for A and B and Slave C
With [RATIO A:B C] displayed on the master unit, set the
ash output for ash tubes A and B, then set the ash
output for slave C. For the setting procedure, refer to
“Manual Flash Mode Settings” above.
MODE-INDEPENDENT FEATURES
Modeling ash
Press the depth-of-eld preview button on your camera to
trigger modeling ash. (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 ash 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 ash
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 ash res in synchronization with the rst
shutter curtain when the shutter is fully open. With Second-
curtain Sync, the ash res 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 benet when you are working at close
distances or if you are using the ash for ash-ll lighting.
To set either option:
1. Press the <+> and <−> buttons simultaneously to
select the ash sync option of your choice. The icon
for the corresponding mode will appear on the LCD
screen as well as in your camera’s viewnder. 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.