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Two new articles posted: Using a 10-turn pot with a delay unit

and Selecting a flash unit for high-speed photography


Camera Opto-Switch Kit


The Camera Opto-Switch allows our trigger circuits to actuate an electronic camera while providing complete electrical isolation for the camera. Here's what you need for a complete Opto-Switch.

  • The switch box kit
  • A shutter release cable for your camera

The Camera Opto-Switch has toggles for focus and shutter operations, a pushbutton for manual operation of the shutter, and an optoisolator for complete electrical isolation between the trigger circuit and the camera. The kit comes unassembled. Soldering is required for the assembly, and holes must be drilled in the box lid for components unless you select the drilled option. A layout template is provided. See the assembly instructions.


For information on which trigger circuits require an Opto-Switch, see this chart.

Click on the photos for larger images

Camera Opto-Switch Box

Camera Opto-Switch Box

(assembly required)

Camera Opto-Switch with shutter cable

Camera Opto-Switch with shutter cable

(cable for Nikon MC-30 shown)

For a complete Camera Opto-Switch, order both the switch box and the cable for your camera. If you have more than one type of camera, you can order a cable for each one, but the same switch box will work for all cameras.


Camera Opto-Switch Box Kit

Camera Opto-Switch BoxAll the parts for the switch box and the trigger cable are included. Assembly is required. Order the shutter cable separately below. Here is the complete parts list.


COS - Camera Opto-Switch Box Kit, unassembled - $18.50


Camera shutter cables

Select the shutter cable for your camera below. See the list of compatible cameras here.

Canon 80N3 cable with adapter Nikon MC30 cable with adapter Nikon MCDC2 cable with adapter
Canon 80N3 Nikon MC30 Nikon MCDC2
Canon 60E3 cable 3.5mm male-female extension cable 3.5mm connectors
Canon 60E3 3.5mm male-female extension Cable connectors (DIY)
  • The Canon 80N3 and the Nikon cables are about 1-foot long and may be coiled or straight, depending on what we can get from our suppliers. The stereo plug is 2.5mm, and a 2.5mm to 3.5mm stereo adapter is included for connection to a trigger box. A 6-foot extension cable may be purchased for just $1.95 more.
  • The Canon 60E3 cable is 6 feet long with 2.5mm and 3.5mm plugs.
  • DIY option: If you want to use a shutter release cable that you already own rather than buying one of ours, you can just get the 3.5mm male and female stereo connectors and follow these instructions.

Shutter cable option


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