Camera Flash / Speedlight: Nissin i40 Flashgun Flash Unit Flashgun for Nikon
Model Name: Nissin i40 Flashgun Flash Unit Flashgun for Nikon
Image:Nissin i40 Flashgun Flash Unit Flashgun for Nikon
Fivercam Price (used) UK
eBay Price (used) UK
Release Date
Strenght / Power
Guide Number (ISO100, meters) Flash Specs GN40 [at 105mm (53mm) zoom head position] GN27 [at 35mm (18mm) zoom head position]
Power Level Switching (Vari-power Range)1/1 to 1/256 (Manual)
Head & Coverage
Bounce (Up-Down) Head Movement0 to +90°
Swivel (Rotation) Head movement360°
Focal Length Coverage Flash Specs 24mm (12mm) - 105mm (53mm) [16mm (8mm) when using built-in wide panel]
Auto Zoom Head Flash Specs Yes
Flash Related Functions
Flash Durations Flash Specs 1/800 to 1/20000 Second
Flash Modes(TTL) Flash Specs Nikon i-TTL, Manual Hi-Speed Sync, Second-Curtain Sync, Slow Sync
Flash Exposure Compensation / Correction Flash Specs -2 to +2 EV (1/2 EV Steps)
Secondary Illumination Flash Specs Video Light
Wireles Flash
Wireless Operation Flash Specs Optical Pulse (TTL/Manual) Unspecified Range (Optical Slave)
Wireless Groups Flash Specs 3
Wireless Channels4
Remote Timing ModesNone
Other Features
MountHot-shoe mount flash
Off Camera Terminal / External Connectors
Included AccessoriesSoft case, Flash stand (with screw), Soft box, Carabiner (not for climbing)
Other Functions
Power Source & Recycle Time
Power Source - BatterryFour size-AA Alkaline, 1.2V NiMH batteries
External PowerNo
Minimum Recycle Time (Charging time between shooting) Flash Specs Approx. 0.1 to 4 Seconds
Battery Life Flash Specs
Dimensions & Weight
Dimensions3.3 x 2.4 x 3.3" / 83.82 x 60.96 x 83.82 mm
Weight7.16 oz / 203 g
More Details or Support Website: Link
Item 1
Fivercam Wiki information:

There are three ways to trigger off-camera flash units wirelessly: via infrared, radio signals or a hybrid method that involves both infrared and radio. The infrared system works like the TV remote; there need to be a direct line of sight for the signal to reach the destination. The radio signal has no line-of-sight limitations, but comes at a rather high cost. The hybrid system simply takes the infrared signal from the commander, converts it over to radio and then converts it back to infrared on slave units.

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