Due to its compact appearance and lightweight design, the Nissin i40 can easily fit into any photo or jacket pocket, making it ready for any situation in no time. Many people overlook the benefits of an external flash during the day because they can take up space and limit mobility. They often sacrifice comfort for inflexibility in light control, especially in strong backlighting from the sun. The Nissin i40 changes this, allowing photographers to enjoy both comfort from its extremely compact design and flexibility in lighting with all its photographic possibilities.

The professional design of the flash head is a testament to its capabilities. It can swivel horizontally by 180 degrees to the right and left and tilt by 90 degrees. The numerous possible setting angles make indirect flashing easier and more versatile. Advanced users will appreciate the maximum flash sync speed of up to 1/8000 second when using second curtain sync, which can be critical when photographing moving subjects. The total shutter speed range of the i40 is between 1/800 and 1/20000 second. A shorter shutter speed allows for more flashes to be fired, ensuring even flash illumination. This feature is particularly interesting for portrait photographers who want to use flash in daylight while maintaining a large aperture for a shallow depth of field.

Notably, the integrated LED video light is a remarkable feature for such a compact flash. Nissin is addressing the growing trend of video functions in still cameras, enabling users to shoot respectable film sequences without needing a separate video light for up to 3.5 hours with fully charged batteries. The strength of the LED light can be adjusted in nine steps to meet individual needs.