Sigma EF-630

This sturdy and feature-rich flashgun from renowned optics manufacturer Sigma includes full TTL compatibility, and boasts a colossal GN of 63 at ISO 100 and 200mm... 

Sigma EF-630 flashgun

Sigma EF-630 flashgun

The TTL works extremely well, even when stopping out the sky and shooting into the sun. The power range can be set anywhere from 1/1 to 1/128, using the simple rear controls and LCD screen, or the handy twist-control on the side, to ensure you get the best exposure when working manually. 

The flashgun supports a focal length of 24-200mm, and has a modelling flash function – so you can double-check you’re not casting shadows before you take your shots. The head can be tilted upwards from -7° to 90°, and 180° left or right. 

Off-camera fans can use the EF-630 as a slave unit, triggered by your camera’s flash commander. 

This is the most expensive and heaviest flashgun in test, but it does offer the most power to compensate.


  • Extremely powerful GN 63
  • Tough build
  • Simple menu


  • Expensive
  • Lack of menu options
  • Heaviest in test


  • GN: 63 at ISO 100 and 200mm
  • Max duration: 1/20,000sec
  • Max recycle: 3sec
  • WxHxD: 79x148x122mm
  • Weight: 490g