PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only | Essential Photo | Photographic lighting and equpiment
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PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only

Product Code: M-060015   Availability: In stock
£41.99 inc. vat

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Product Information

PLEASE NOTE: This video is not full a representation of what is included in this listing as some items are used for demonstration purposes only. Please see the “Specifications” tab for information on what this listing includes.

The PIXAPRO PRO ST-III equivalent to Godox's X1 TTL is a 2.4GHz Radio flash trigger system capable of transmitting TTL information between your camera and compatible flashes. The PIXAPRO PRO ST-III trigger has a transmission range of approximately 100m in an open area, and since the transmitter and receivers use radio waves as opposed to Infra-red, you don’t need direct line of sight, and is not affected by bright Sunlight which can sometimes cause problems with optical slave systems.

As well as the traditional A:B C ratio style interface, the PIXAPRO PRO ST-III C also has a full GR Group style interface allowing up to 5 Groups to be individually set to either TTL, Manual, or Off. You also have the ability to mix TTL and Manual Groups if needed, which makes the PRO ST-III system very versatile. The ST-III system also has 32 separate channels, which enable you to use your ST-III trigger system in the vicinity of other photographers, without fear of accidentally triggering each other’s lights.

The PIXAPRO PRO ST-III supports TTL, HSS (High Speed Sync) and even has a HSS Pre-sync Timing Adjustment feature, which is great for those times where you need to increase your shutter-speed beyond your camera’s sync speed.

It also a Micro USB port to enable you to update the ST-III’s Firmware as new technologies become available.

The perfect solution for the busy photographer who require a reliable TTL radio trigger system.

PLEASE NOTE: ST-III Trigger is designed for use with the CITI600, Hybrid360 TTL, and PIKA200 TTL and STORM II 600 Flashes which have built-in ST-III receivers. Use with other flashes require a separate receiver.


  • Large 100m Transmission Range
  • Supports up to 5 Groups and has 32 different channels
  • Supports High Speed Sync up to 1/8000th sec.
  • Can also be used as a Wireless shutter release
  • Large LCD Display
  • Powered by 2x AA batteries


  For more information about how High-Speed Sync works, Please Click Here.




TTL Flash

TTL  Auto flash

Radio Frequency

2.4GHz Transmission

Power Supply

2x AA Batteries

Manual Flash Triggering


Manual Flash Control


High-Speed Sync Support


Working Range

100m (In an Open Area)




5 in GR Grouping Mode

3 in Ratio Grouping Mode









PRO ST-III T (Transmitter)



Delivery Information

This year, PiXAPRO will be on Stand E91 at The Photography Show, NEC from Saturday 17th March – Tuesday 20th March 2018.

All orders placed from Thursday 15th March will have an ETA of 1-2 working for express/next working day deliveries, and 2-3 working days for standard deliveries.  Please note, next working day/express/timed and Saturday deliveries cannot be guaranteed during this time. Unfortunately in this instance postage cannot be refunded due to the delay caused by The Photography Show.

Please note that address changes/cancelations cannot be guaranteed during this time, we would recommend sending an email to our team, and then contacting them by phone to ensure this has been received.

During this time, you may receive an email from the courier to say your delivery has been booked in, but the item has not been received – this is too speed up the process once our offices reopen, however please note this courier email is not confirmation or proof that your items have been dispatched. As mentioned, items will not be dispatched until we reopen.


Free UK Standard delivery on orders over £150*


Our Delivery Options

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1.       What are my delivery options to the UK? 

  •     UK Saver Delivery £4.00 – We recommend allowing 2-3 working days for your order to reach you.

Order Date (if received before 3pm)

Latest Expected Delivery Date














  • UK Next Working Day Delivery £6.00 – If your order is received before our daily cut off time of 3:00pm, your order will be dispatched out from our warehouse the same day. You should then expect to receive your order the next working day.

Order Date (if received before 3pm)



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Reviews for PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only

(5)   By: Steve | 31 January, 2018

Great product works very well with Pixapro Flash.

Great product works very well with Pixapro Flash.

(5)   By: John | 30 January, 2018

ETTL flash with on camera control. Great unit, great price.

ETTL flash with on camera control. Great unit, great price.

(5)   By: Chris | 23 November, 2017

PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only

Good value works a treat. Reliable and great build quality

(3)   By: chris | 26 October, 2017

PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter

It's ok. If the replacement (which I have on back order was available, I wouldn't have ordered one of these).

(5)   By: alan | 26 October, 2017

PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only

Fantastic transmitter, hasn't failed yet

(5)   By: tony | 26 October, 2017

PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only

exceeded my expectations thanks

(5)   By: Stephane L | 22 September, 2017

PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter

I was waiting for this transmitter for olympus , now i'm happy Thank you

(5)   By: oleg | 30 August, 2017

PRO ST-III T 2.4GHz Flash Transmitter Only FOR FUJI

Just received the product, everything is working as expected

(5)   By: steph | 10 July, 2017

PIXAPRO® PRO ST-III T 2.4GHz Flash Transmitter Only

As expected Quality is very good I'm happy with it

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Returns Policy

Contact Us!

1. EssentialPhoto is committed to the provision of quality and reliable products and outstanding customer service. Buyers are entitled to cancel the order and return the goods within 30 working days for a full refund of the purchase price of the goods, please contact us at customerservice@essentialphoto.co.uk with your order number, within 30 days of your purchase, prior to your return.

Return Form

2. Buyer shall fill out the Return Form, found above. Please include a copy with the return order. Please be aware, an order number must be visible on the return form which is included in with the parcel, this is so your return can be identified when received by our returns department. Please be aware, that missing information on the return form may result in a delay when dealing with your request. Please provide your order numbers and completed return form when you return a product. As mentioned, if the returns form is missing or incomplete, this may delay the refund/replacement process. Please be aware, without the proof of an order number, PiXAPRO/EssentialPhoto hold the right to deny a return request. 


Return Order

3. Buyer shall return the product to our warehouse within 30 working days of the original purchase date as long as it’s still in its original, unopened packaging. Please be aware any missing original packaging, or damage to the item(s) returned may result in the amount due to be refunded being affected. Please ensure the return address does not include the address line "Bradfield House" as any items going to this address will not be returned back to us and we may not be able to retrieve the return. Therefore, as mentioned please ensure the address line is as shown above.

All return products must be packed in well protected or if possible, original packaging including the application form any accessories, manuals, documentation, and registration that was...


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Questions & Answers


There’s a common issue with Nikon bodies when used in conjunction with the AF-assist beams of third-party flashes/triggers for some unknown reason.

The best solution would be to disable the AF assist beam all together on the ST-III trigger, by switching the AF-Assist beam of at the switch, and also disabling it in the ST-III's custom functions menu (C.fn-06 and set it to 0), and then enable the AF assist lamp on your camera body.


Firstly please check that AF assist beam switch on the trigger is on (please see image below). If the AF assist beam switch is on, please check that your camera's shutter speed is at 1/200sec or slower, as the AF assist beam will only fire on when used with a slower shutter speeds (shutter speeds of 1/60 or less tend to work better).

Please be aware that the FUJI X system cameras is separated into three different categories, and AF assist beam can only be used with cameras in category A. Please see tables below if you're unsure.


Your Fuji camera needs to be set to TTL flash mode ( please see the snippet from the manual below). Once your camera is set to TTL flash mode, then your trigger should work with no problems.


The ST-III trigger cannot be powered using the USB port, this can only be powered by AA batteries.


First, please ensure the Firmware for your ST-III trigger for Fuji is up to day (the current Firmware can be downloaded from our Firmware Download Page.

Once you have updated your ST-III to the latest firmware, enter the Custom Functions Menu (which can be accessed by pressing and holding the <CH/OK> button for two seconds), go toe C.Fn 11, and change the settings according the table below:

C.Fn No. Function Setting Description
C.Fn-11 Setting specific cameras and Flashes 00 General Fujifilm Cameras
01 The cameras that use between-the-lens-shutters (eg. X100F, X100T etc.) Choose this option and set all groups to M mode and reach high-speed sync within 1/1250s.
02 Choose this option and set all groups to M mode to solve the problem that the Li-ion580 II M cannot achieve High-speed sync, when flash is triggered by ST-III


It would depend on the model of Fuji Camera that you are using, as only certain models currently have High-Speed Sync support with the ST-III trigger system (please see table below for more details).


Unfortunately the ST-III can not automatically switch the Canon 580EX II to high speed sync mode. To use HSS, you will have to switch youe 580EX III to HSS mode manually first.


You can use this trigger for Rear Curtain sync. To activate it, you have to go into the Custom Functions Menu.

Press and hold the "CH" button for a few seconds, and the Custom-functions menu should come up. Once in the Custom Functions menu, use the scroll wheel to go down to function 4, which will enable you to activate the Rear Curtain Sync mode.

PLEASE NOTE: With a Nikon camera, Rear-Curtain Sync is controlled from the camera, and not from the trigger. Please see your camera's user manual for more details.


Our flash triggers are not compatible with PocketWizard triggers unfortunately.

The Built-in flash trigger on the Sekonic Flash Meters, are also not compatible with our triggers, however you can still meter the flash by pressing the "TEST" button on the flash trigger. Most flash meters have a mode where it will wait a certain amount of time after the mesure button has been pressed for a flash to fire. Simply put your meter into this mode, press the "Measure" button on the meter, and then press the "Test" button on the trigger to fire the flash so you can get your exposure reading (Please refer to your flash meter's manual for more details).


Please see image below which shows which switch configurations represent which channels on the ST-III Trigger system. Please Note: Your ST-III must be set to manual mode to work with PRO AC 2.4GHz receiver. Not compatible with older 433MHz Receivers.


The 1/256th power setting isn’t available by default, you have to enable it in the Custom Functions menu (CFn). To enter the custom functions menu, press and hold the <CH> or <CH/OK> button (depending on which batch your trigger is from) for a few seconds and the custom functions menus should come up. Once in the Custom Functions menu, scroll to CFn. 5 and press the <GR> button, and the option will flash. Use the scroll wheel to select the 1/256 power setting, and then press the <GR> button again to set it. To go back to the main menu, press the <Menu> button.


  1. First download and install the G1 program which is required to upgrade the Firmware for All Pixapro Flashes and Triggers The G1 Software can be downloaded from our Firmware Download Page.
  2. Download the relevant Firmware Update file for the product you would like to upgrade the Firmware for from our Firmware Download Page.
  3. Open the G1 program, and click the "Select File" button and select the firmware file that corresponds to the product that you would like to upgrade.
  4. Connect the product to your computer using a micro USB cable (The same type used by most Android phones).
  5. Then click the “Connect” button in the G1 program to connect to the Pixapro Product. If connection is successful, a message will be displayed on the G1 program menu. If connection is unsuccessful, please check that the Micro USB cable is properly inserted, and/or is working.
  6. Once Connection is Successful, click the "Upgrade", and you will be prompted when the upgrade is complete. If Upgrade is unsuccessful please repeat process from step 3.
  7. Once the Firmware has been updated successfully, then click the “disconnect” button in the G1 Software, and then disconnect your product from your computer.


To restore your ST-III back to factory settings, press <CH> and hold the button whilst turning the Transmitter on.


You have to set the Flash Exposure Compensation (FEC) from the transmitter itself, and not the flash, however the FEC will not be displayed on the speedlite itself.


Please upgrade the firmware of your transmitter (ST-III C for Canon - V15 or later, ST-III N for Nikon - V16 or later, ST-III S for Sony - V13 or later). To activate the super close (30cm inside) trigger option, hold down the TEST button and switch on your ST-III trigger until the STATUS indicator flashes twice. After release, you can access this option from the wireless remote control 0-30 meters.


It sounds like your camera may be set to Red-Eye Reduction mode. When in this mode, your speedlite will rapidly flash which is used to close the pupils of your subject to reduce or eliminate red-eye). Please ensure that the Red-Eye reduction is disabled in your camera settings


The Auto-Zoom feature will only work when trigger is flash is set to auto (A) mode. The Auto zoom is disabled when use in manual (M) mode.


There are many different reasons which could cause the ST-III triggers to misfire. Here is a list of the possible causes:

  • The transmitter battery is low: In this situation make sure there is sufficient battery power to power the ST-III transmitter. Check the display to ensure that the “Low battery” icon is not blinking.
  • The receiver battery is low: In this situation make sure there is sufficient battery power to power the ST-III receiver. Check the display to ensure that the “Low battery” icon is not blinking.
  • Since the ST-III uses a 2.4GHz frequency, other devices that use a similar frequency (such as 2.4GHz wifi routers, Bluetooth devices, etc.) can interfere with communication between the ST-III triggers, and cause misfires. If there any similar devices in the vicinity of the triggers, try switching channels, which should hopefully resolve the problem.
  • Make sure that the flash ready indicator is lit, and not in thermal protection or any other abnormal state.
  • Try updating the Firmware on the ST-III Triggers and/or Receivers.


To check which version of the Firmware Version you have installed on your ST-III trigger: Switch the power off, then press and hold the <MODE> button, and then switch the power back on whilst still holding the <MODE> button.

To check which version of the Firmware Version you have installed on your ST-III Receiver: Switch the power off, then press and hold the <GR> button, and then switch the power back on whilst still holding the <GR> button.

Your Current Firmware Version should then be displayed on the screen like as shown in the photograph below.


The Hot Shoe on the trigger allows you to use a feature known as TTL Pass-Through, which enables you to use your ST-III trigger and a TTL speedlite on camera simultaneously. Perfect for times when you still need a speedlite on camera as a fill light etc.


No, that doesn't work unfortunately. The master flash requires some kind of physical connection to the camera’s hot shoe in order for that to work. You can either sit the master flash directly on the camera’s hot shoe, or use an off-camera TTL flash cord.

The only way around it would be to use one of the following solutions:

  • Place a speedlite, set to master mode on top the ST-III trigger’s hot shoe, whilst the ST-III trigger is on camera.
  • Purchase another ST-III receiver for the other speedlite.
  • Purchase an Off Camera TTL cable for the Master flash to sit on.


To use the Multi-Flash Setting with your ST-III Flash Triggers, please follow these steps:

  1. To Set-up multi-flash function on your ST-III trigger set, keep pressing the button until the TTL and M icons are not displayed on the LCD (As shown in the photo below). Once that has been done, press and hold the Button to enter multi flash setting submenu.

  2. Once in the Multi-Flash submenu, two lines displayed as T (for the amount of flashes) and H (for the flash frequency in Hz) should appear as shown in the photo below.

  3. Press the Button to make the “T” value blink. Once blinking, you are able to set the amount of flashes according to your needs by using the wheel.
  4. Press the Button again to change the “H” value.
  5. Once your Multi-Flash settings have been set, Press the Button to exit the Multi-Flash settings screen
  6. In the multi flash setting submenu, press the Button to return to main menu. Multi Flash Settings (Output Value)
    1. In the multi flash (TTL and M icon are not displayed), press the Button to set the current group.
    2. In multi flash mode, you will be unable to exceed 1/4 power as the flash units can’t do multi-flash with output settings higher than ¼ power.


For Nikon models: Rear-curtain sync is controlled by the camera, so no set-up is needed on the transmitter. Please refer to camera manual for details.


The ST-III triggers are cross compatible with the Pro AC 2.4GHz Receivers, and also the ST-I 2.4GHz receivers. However, they are not compatible with the ST-II transceivers, or the older 433MHz versions of the Pro AC or the ST-I receivers


The ST-III triggers should work with no problems, though you would require a ST-III receiver for each of your Li-Ion TTL speedlites. You can also control the power of your Li-Ion TTL speedlites remotely.


Whilst you can use the ST-III to trigger these lights, you can’t remotely control the power of those flashes. In order to do that, you will require the PiXAPRO PRO AC Trigger set

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