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Multi-Trigger 3 Kit, assembly required

MT3i / MT3v


The Multi-Trigger 3 has been replaced with the Multi-Trigger 3+.


For MT3 accessories, click here.

Multi-Trigger 2 control box

Control box above; cables below

Microphone cable Variable-width photogate cable Interrupter photogate cable
Microphone Variable-width photogate
(for the MT3v)
Interrupter photogate
(for the MT3i)

The Multi-Trigger 3 (MT3) is an upgrade from the Multi-Trigger 2. Improvements include greater ease of use, an additional 4 outputs on the lid of the box for camera and flash, elimination of the focus/review switches for the camera shutter, pulse outputs for diagnostic purposes, and a label designed specifically for the MT3. The MT3 has all the same functions as the previous model. These include:

  • all components hard-wired for durability
  • operates either on a 9V battery or an optional 120-240 VAC to 9 VDC adapter
  • LEDs to indicate power on, photogate alignment, and event triggering
  • test button to produce output pulses without a sensor cable connected
  • inputs for microphone and photogate sensors as well as external triggers
  • selector for microphone or photogate input
  • fine (up to 0.05 s) and coarse (up to 0.5 s) delay adjustments
  • selector for one of two delay ranges (0 to 0.5 s or 0 to 0.05 s)
  • continously-variable timeout setting up to 1 s
  • instant and delayed optically-isolated outputs

The MT3 kit includes all the parts for the (i) control box, (ii) the microphone cable, and (iii) one of the two types of photogate cable. The MT3i version of the kit includes parts for the interrupter-type photogate. This is version you would choose if you were, for example, using the MT3 in conjunction with the AstroSplash Drop Controller to capture drop collisions. If, on the other hand, you need a photogate cable with variable width for larger objects, you would select the MT3v version.


If you want both types of photogate cable, you can order the second type from the MT3 accessories page. Also see the accessories page to order the optional 9V AC/DC adapter.


The Multi-Trigger 3 kit with control box and sensor cables requires assembly. Experience in wiring, soldering, and troubleshooting electrical circuits is assumed. Here are the assembly instructions.


Additional information:

Select below the version with the photogate that you prefer.


$74.95 - Multi-Trigger 3 Kit (interrupter photogate option) - MT3i, assembly required


$74.95 - Multi-Trigger 3 Kit (variable-width photogate option) - MT3v, assembly required


What else is needed

  • In order to trigger a flash unit or wireless transceiver, select a flash trigger cable kit.
  • In order to trigger a camera shutter, select the shutter cable for your camera.

See below for options.

Flash Trigger Cable Kit (3.5mm type)

Hot shoe adapterThis kit is for preparing a cable to connect the flash output of the Multi-Trigger 3 to a PC jack. The kit includes a PC-type connector for the flash, a 3.5mm mono plug, 3-ft of 2-conductor cable, and heat-shrink tubing. Assembly is required. If your flash unit doesn't have a PC jack but does have a hot shoe, the hot shoe adapter shown to the right can be used together with a flash trigger cable for flash triggering.


If your flash unit is one of the Vivitar models 283, 285HV, or 3700, you'll need a Vivitar PC-1 cord to connect to your flash unit. Click here for one possible source. If you're triggering your flash wirelessly or your flash unit has a 3.5mm synch jack, see this page for 3.5mm cables.

PC flash trigger cable kit with 3.5mm plug PC flash trigger cable with 3.5mm plug

PC cable kit with 3.5mm plug,

unassembled - $4.95

PC flash trigger cable,



Select a flash cable kit $4.95), a hot shoe adapter ($9.95), or a combination of flash cable kit ($13.90). The latter combination saves you $1 over purchasing the items separately.

Select option

Shutter Cables


We provide shutter cables for most camera makes/models for use with our triggers. When you order a shutter cable, we include an extension cable and adapter, if needed, to convert the cable for use with the 3.5mm stereo jack on our triggers.


Select your camera make/model below and note the corresponding ID. If you don't find your model listed, compare the socket on your camera to the photos below. The photos will enlarge by clicking on them. If you are still unable to determine the type of plug that you need, please contact us. If you already have a shutter release and want to convert it for use with our triggers, this page may help.


All shutter cables, which include extension cords and adapters (if needed), are $12.95.

Plug ID

Plug ID

Camera Make/Model Plug



Canon EOS Rebel series, T/X series, EOS 60D, 70D, 100D, 300D, 350D, 400D, 450D, 500D, 550D, 1000D, Powershot G series; Pentax K10D, K20D, K3, K5, K7 RS-60E3 plug



Canon EOS 5D Mark II/III, 10D, 20D, 30D, 40D, 50D, D30, D60, 5D/6D/7D, 1D/1DX, 1D/1DS Mark III, 1D Mark III, 1D Mark IV RS-80N3 plug



Nikon D1/D2/D3/D/D4/D5 series, D100, D200, D300, D300s, D500, D700, D800, D800E, D810, D810A, D850, F5, F100, F90, F90x; Kodak DCS-14N; Fuji Finepix S3pro, S5pro Nikon MC30 plug



Nikon D90, Df, D610/750/3100/3200/3300/5200/5300/7100, Coolpix 7700/7800, Coolpix A Nikon MCDC2 plug
S1 Sony Alpha A99, A100, A200 ,A290, A300, A350 ,A380 ,A390, A450, A500, A550, A580, A700, A850, A900SLT-A33, A55, A65, Minolta Maxxum 5D, 7D, 7, 9xi, 7xi, 5xi Sony S1 plug
S2 Sony ILCE-7 / A7R / NEX-3NL / A5000 / A6000 / A58 / A3000 / HX300 / RX100II Sony S2 plug
CB1 Olympus E1, E3, E5, E10, E20, E300, C7070, C8080 Olympus CB1 plug
UC1 Olympus E620/E520/E510/E420/E410/E400,
SP-510UZ / SP550UZ / SP-560UZ / SP-565UZ / SP-570UZ / SP-590UZ / SP-810UZ
XZ-1 / SZ-30MR / SZ-20/SZ-11 /
E-P1 / E-P2 / E-P3 / E-PL1 / E-PL2/E-PL3 / E-PM1 / E-PM2 / E-PM3 / E30 / EM-5 / EM-1
Olympus UC1plug

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