pro master ST1 User manual

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Parts Identification
Basic Operation
Receiver operation
Transmitter operation
Flash triggering
Parameter control triggering mode
Advanced Applications
Shutter release function
Troubleshooting Guide
Specifications
Firmware upgrade 23
Precautions
9

Receiver
Transmitter
Precautions
1. Do not attempt to disassemble, open, or repair this transceiver by
yourself.
2. Always use batteries of the same type, brand, and age. Always
replace both batteries at the same time. Do not combine different
types, brands, old, or new batteries. This could cause the batteries
to overheat, leak, or explode.
3. This product is not water resistant. Keep it away from rain, snow,
and high humidity areas.
4. Install the batteries in proper orientation as indicated in the
battery chamber.
5. Remove any batteries from the unit before storing the unit for long
periods.
This product is a wireless transceiver, meaning it can act as either a
transmitter or as a receiver. For the purpose of this instruction
manual it will be called a transmitter (master unit) when installed on
the hot shoe of a camera. It will be called a receiver (slave unit)
when a flash is installed or connected to it for remote operation.
Also, the words 'flash' and 'speedlight' may be used
interchangeably.

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Dot matrix LCD display screen
Equipped with an AF focus assist beam (can be disabled)
Supports wireless shutter release for camera
Can individually set group A/B/C/D/E for flash exposure
compensation or flash output within Gr mode
Can individually set group A/B/C flash output within Manual mode
Can individually set exposure compensation and ratio within TTL
mode
Can individually set flash output, frequency, and flash number
within Multi mode
Functions as a basic flash trigger (max sync speed is
1/250S) with a standard hot shoe
Foreword
Here are some of the ST1's features:
Thank you for purchasing the [pro]master ST1 Transceiver.
The ST1C is an excellent tool for advanced wireless flash
photography using Canon cameras and speedlights. Its various
flash-mode functions, include: Gr, E-TTL II, M, Multi, and it
supports a maximum shutter sync speed of 1/8000S. It can also
control up to five flash groups.
From the transmitter you can directly control the flash mode,
output power, and focal length for each group.The ST1's
remote distance can reach up to 100m while supporting 15
wireless channels and 1auto channel.
Shutter Sync: first curtain sync, FP high-speed sync. Maximum
sync speed is 1/8000s
Supports exposure compensation and flash value lock function
Supports 15 wireless channels and 1 auto channel

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Transceiver Mini Stand
Firmware can be upgraded through the USB interface
PC sync port
Please read this manual while also referring to your
camera and speedlight's instruction manuals.
Included items:
The ST1 comes with the following accessories.
Manual
ST1C Mini Stand

Parts Identification
PC sync port / USB
Interface
Hot foot
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Parts Identification
①Status Indicator ②Power Switch ③Increase Button
④Battery Cover ⑤Decrease Button ⑥Confirm ‘OK’ Button
⑦Zoom/ Function Button ⑧Select/ Sync Button
⑨Mode Button/ Master or Slave Switch
⑩Locking Ring
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Transmitter Display
Focal Length Area
Group Function Mode / Exposure Compensation
isplay Area
Number of groups Display Area
Flash mode Transceiver Mode
Channel Icon
Power Icon
AF Assist Beam Emitter State
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Receiver Display
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Transceiver Mode

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①
①
Inserting the batteries
Basic Operation
Opening the cover.
Slide it down as shown by
the arrow to open.
Installing the batteries.
Make sure the + and - battery
contacts are properly oriented
as shown in the battery
compartment.
Closing the cover.
Close the battery compartment
cover and slide it up as shown by
the arrow.

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Preparing to attach the
transceiver.
Attaching the transceiver.
Mount the transceiver into
the camera's hot shoe by sliding it
in all the way.
Securing the transceiver.
Detaching the transceiver.
Attaching to the camera
Basic Operation
Loosen the locking ring by
turning it in the direction of
the arrow.
Turn the locking ring in the
direction of the arrow to tighten.
Loosen the locking ring. Then
remove the transceiver from
the camera’s hot shoe by
sliding it out.

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Turn on the power.
Turn the power switch
to <ON>.
Turning on the power
Basic Operation
Turn off the power.
Turn the power swith
to <OFF>.
As a Receiver it will not enter a sleep state.
In order to save power, the Transmitter will enter a
sleep state after a specified time (this time can be
adjusted as a custom setting). The LCD will not
display. Press the shutter button halfway or press
the test button to wake it up.

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Custom Setting
Press the button for approx.
2 seconds to display the custom
setting menu.
Press the button to highlight a
setting you wish to adjust.
●
Press the button for approx
2 seconds return to exit the
Custom settings menu.
Button Backlight
15MIN: 15minutes
0
45MIN: 45minutes
OFF: Function canceled
3 MIN: 30minutes
5 represents the
maximum contrast;
0 represents the
minimum contrast
LCD contrast
You can customize the transmitter features to suit your shooting
perferences with custom settings by using the Senior menu.
LCD backlight
Press the button to access
a particular setting.
● Use the and buttons to
adjust a setting.
*Standby controls the length of time
before the ST1 enters sleep mode.

Press button to
highlight zoom A.
Focal length setting
Transmitter operation
Press button to
confirm.
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You can continue pressing
the button to highlight B, C,
D, or E group and control
the zoom setting for that
group.
Press button to manually
increase the zoom setting
Press button to manually
decrease the zoom setting
Choose "00mm" to
automaticaly match the
zoom setting of the lens.

Group 'Gr' Mode Setting
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Transmitter operation
Press the or button
change the flash exposure
compensation value FEC
for the group.
Press the button to set
a mode for the highlighted
group.
Press the button to select
a group (A, B, C, D, or E).
Press the button to
confirm your selection.
Press and hold the button
to choose Gr mode. (Each time
you press and hold the zoom
button for approx. 1 second the
mode will toggle between Gr,
TTL, M, and Multi.)

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Manual Mode Setting
Transmitter operation
Press and hold the
to toggle to Manual mode.
button for approx. 1 second
Press the or button
to change the group.
Press the button to
select the group icon.
Press button to confirm
your selection..
Press the or button
choose a flash output level
for your selected group.

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TTL Mode Setting
Transmitter operation
Press and hold the
button 1 second at a time
to toggle to TTL mode.
Press the or button
to choose an overall
exposure compensation
value.
Press the or button
to change the ratio or
exposure compensation.
Press the button to
highlight a group icon.
Press button to confirm.
Press the or button
to choose a value.
Press the button to select
exposure compensation of
group C in A:B:C mode.
Press the button to
confirm.

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Multi Mode Setting
Transmitter operation
Press and hold the
button 1 second at a time
to choose Multi mode.
Press the or button
to choose values for each.
Press the button to toggle
among group number, times,
and frequency (Hz) .
Press button to confirm
your selection(s) .
Use the following equation to
determine the shutter speed.Then
set your camera to a shutter speed
slower than the calculated number.
Shutter speed = Number of flashes
per frame / Frequency of flash
(Hz).For example, if the number of
flashes per frame is 10 and the
frequency is 5Hz , divide 10 by 5 to
get a shutter speed of 2 seconds or
slower (set a sutter speed of slower
than 2 seconds).
B(bulb) may be used for the shutter
speed.

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Transmitter operation
Transmitter channel setting
Press button and
hold it for approx. 1
second to highlight
channel in any mode.
to ch ose a channel.o
Press the button to
confirm your selection.
If another photographer is using a similar type of
wireless flash system close by, your receivers may
accidentally fire in sync with that photographer's
transmitter. Use a different channel number to avoid
this.
Be sure to set the transmitter and receivers to the
same channel.