Nissin i40

This small flashgun is available for most major camera brands, except Pentax...

Nissin i40 flashgun

Nissin i40 flashgun

It’s a diminutive yet sturdy and capable flash offering GN 40 at ISO 100 and 105mm, making it very powerful. 

To pack in the features, it has sacrificed a screen and multiple controls, relying instead on two simple dials on the rear – the first controlling the mode and the second the power. 

This flash has a very short duration of 1/800sec at full power (or 1/20,000sec at minimum power), which is perfect for freezing action at shutter speeds of up to 1/8000sec if you’re using high-speed sync, and the head tilts upwards to 90° and 180° left and right. 

As well as a full TTL mode, and manual control over the power from 1/1 to 1/256, it also includes a built-in video light, with an output of 9 steps of light, and will run for up to 3.5 hours from a single set of batteries. 

While some may want a bigger range of info on display, this simplistic approach works well and allows the size to be kept down.


  • TTL
  • 9-step video light
  • Short flash duration


  • Not as powerful as others in test
  • No rear screen


  • GN: 40 at ISO 100 and 105mm
  • Max duration: 1/20,000sec
  • Max recycle: 3.9sec
  • WxHxD: 85x61x85mm
  • Weight: 203g