NISSIN – i40 – Compact TTL & HSS Flash – Now Available

The new Nissin i40 compact TTL and HSS enabled flashes are now available from B&H Photo and Adorama in Canon and Nikon versions. Sony (MIS), Mirco 4/3, and Fujifilm Mirrorless System versions will eventually follow.

The new i40 are an incredibly compact flash designed for mirrorless and smaller DSLR cameras. Unlike most compact flashes the Nissin i40 provides nearly all the features of much larger full size top end flashes, including HSS and even a video light.

The main omissions really only being an external battery port, sync port, and built in wireless radio slave (full optic wireless slave is supported).


Nissin i40


Nissin have managed to squeeze a very respectable guide number 40m (ISO 100, 105mm zoom), with full 4 AA batteries, allowing HSS (high speed sync), and a power zoom head from 24-105mm, with full 360 degree swivel and 90 degree tilt, all into and incredibly small package.

A side by side comparison with a regular full size flash illustrates the dramatic difference in overall size and height of the new i40.


Nissin i40 Compaired


And following the retro style of many recent mirrorless cameras, instead of an LCD screen the i40 has 2 simple dials for selection of operating mode, and manual power level or TTL exposure compensation (+ or – 2 stops).

9 levels of Manual power control can be selected for either the flash or video light. That’s in full stop increments, and all the way down to 1/256th power level.


Nissin i40 Rear


Modes as seen on the left dial –

Video – Video light with 9 levels of power output
SF – Regular simple Optic Slave Mode (often called S1)
SD – Digital Optic Slave Mode – ignores TTL pre-flashes (often called S2)
M – Manual flash power level
A – Auto sensor flash metering
TTL – Through The Lens automating TTL metering
A-B-C – Optic Wireless Slave mode for Canon / Nikon etc optic wireless systems (channels 1-4).


Zoom length can also be set to Auto to follow the lense, or Manually selected via the ON / OFF button. The LED light color indicating the zoom length (or Auto) –

i40 manual zoom led color


Like the larger flashes the i40 also provides a full 180 degree swivel in both directions, and 90 degree tilt, for bouncing.

Nissin i40


A pop out catch light card, and 16mm wide angle diffuser are included. And even an omni directional diffuser cap is included –


Nissin i40 diffusers


Off Camera Flash –

Optic – For off camera flash users the i40 have a basic S1 & S2 optic slave, as well as an optic wireless slave mode for respective Canon and Nikon optic wireless systems. So the cameras pop up flash can be used to fire and control the i40 off camera in TTL or Manual. The full 3 A, B, & C groups are supported, as well as 4 channels.

Radio – Unfortunately although Nissin are ahead of the game with on-camera flashes like the i40, they have not delved into the world of off camera radio triggering at this stage. Nissin flashes are generally one of the more compatible flashes with off camera TTL radio triggers like the YongNuo YN-622, Phottix Odin, and PocketWizard Control TL systems. Though full compatibility with these systems is yet to be confirmed through user feedback etc.

For manual radio trigger use, most manual triggers should work. Though the coming FlashQ is also incredibly compact, and looking to be an ideal option for traveling (or just walking around) with the i40.

There is no sync port in the i40, or USB port, though future firmware updates can be performed by Nissin (possibly at a cost).


The Nissin i40 currently packs the most function and features into a very compact flash of this size. Although the Canon and Nikon version are available now, its owners of the popular mirrorless systems from Sony, Mirco 4/3, and Fujifilm that will really be eagerly awaiting the new i40.


Nissin i40



Specifications - Click to Expand

Type : For Canon, Nikon, Sony DSLR System, 4/3 & Fujifilm mirrorless System
Guide no.
(at ISO 100 in m) :
40 (at 105mm zoom head position)
27 (at 35mm zoom head position)
Focal length coverage : 24 – 105mm (16mm when using built -in wide panel)
Power Source : Four size-AA batteries
Recycling Time : 0.1 ~ 4sec
Number of flashes (Approx.) : 220 ~ 1,700 flashes
LED video light lighting time (Approx.) 3.5hrs (full power batteries)
Flash duration : 1/800 ~ 1/20,000sec
Color Temperature : 5,600 K
Exposure control : E-TTL II/ E-TTL (Canon) 、 iTTL (Nikon), PTTL (Sony),TTL (4/3), TTL Fujifilm
Wireless Mode : Wireless TTL slave (*1), non-TTL Slave (SD, SF mode) (*2)
EV compensation on flash : +/- 2EV in increments of 1/2 of EV
Bounce position : Up: 0-90°,
Left: 0-180°,Right: 0-180°
Flash exposure control : 1st & 2nd curtain synchronization, High speed synchronization, redeye reduction, slow synchronization (depend on camera), FE/ FV lock (set on camera)
AF-assist beam effective range : 0.7 – 5m
Operation panel : 2 Selector dials (Function dial and Power dial)
Manual mode power ratio : 1/256 ~ 1/1
Video light : Built in video light with 9 steps of output level adjustment
Accessories : Soft case, Flash stand (with screw), Soft box, Carabiner (not for climbing)
Dimension (Approx.) : 85(H)x61(W)x85(D)mm/ 3.35(H)x2.4(W)x3.35(D)inch
Weight : 203g/ 7.16oz (without batteries and soft box)


Notice: Design and specification are subject to change without prior notice.

(*1): Only applicable to wireless Slave mode. Group A – C (any channel 1 – 4)
(*2): SD – Slave Digital (synchronizes to the pre-flash system. The master flash is to be set at TTL (E-TTL for Canon, i-TTL for Nikon and ADI/P-TTL for Sony) mode.
SF – Slave Film. synchronizes to the traditional single flash system. The master flash is to be set at manual mode. Studio lighting system synchronizes to this mode. This mode is also available for open flash, and for a standard flash in the market.


Price and Availability –


The Nissin i40 is available now in Canon and Nikon versions from B&H Photo and Adorama  for $269.

Ebay, Amazon.

Sony (MIS), Mirco 4/3, and Fujifilm Mirrorless System versions will eventually follow.

Nissin – Website


  1. badphoto 7 years ago

    Hi Elv

    So it cannot function as master to control Canon ETTL II slaves?

    Also, is A = Auto Thyristor? If so, how do you set the aperture values and ISO on the flash?

    What’s guide number at 35mm?


    • Author
      Flash Havoc 7 years ago

      Hi badphoto,

      No there is no optic wireless master, only an optic wireless slave mode.

      A – would appear to indicate an Auto Thyristor mode, but there is no detail mentioned on this. So until we can get hold of the user manual I’m really not too sure on that. An Auto Thyristor sensor is often pretty obvious to see on the flash body, though its not obvious on the i40 if its there.

      ISO and Aperture values would have to be automatically sent from the camera (for the Auto Thyristor mode) as there are no manual setting available for that.

      The guide number is 27 meters and 35mm zoom (ISO 100).

  2. Class A 7 years ago

    Could you check whether this one supports remote power control with the Cactus V6 trigger?

    • Author
      Flash Havoc 7 years ago

      Hi Class A,

      I thought that was your job? 🙂

      Seriously though, won’t Cactus have to get one and create a profile first?

  3. Hans 7 years ago

    Anyone know if this little guy supports Multi mode/RPT? I haven’t been able to find it on any spec sheet, so I’d assume it’s a no.

    • Hans 7 years ago

      Got a reply from Nissin via FB: Nissin i40 doesn’t support multi strobe function. You may consider our professional model Nissin Di866 Mark II which have multi strobe mode, Canon, Nikon and Sony version are available. Thank you for your message.

      • Author
        Flash Havoc 7 years ago

        Ok thanks for that Hans!

  4. Erich 7 years ago

    Any thoughts about the compatibility with sony A6000? (universal hotshoe)
    I wonder will all the features (HSS, TTL, erc) work on Sony A6000?

  5. fstop 7 years ago

    Will the i40 work as a Commander for Nikon TTL CLS? (looks like it does as a remote flash, but not clear if it does the on-camera Commander for other Nikon flashed)?

    I am aware that there is a mount coming for Fuji X, but wondering if the Nikon version will work on a Fuji mount (in MANUAL mode)? If it fires in the manual settings, that would be perfectly fine with me.

    Thanks for the insight!

  6. Bob B. 7 years ago

    Can an auxilary batter of some type be used with this flash unit? …and if so…what would you recommend?

  7. mat 7 years ago


    I just tested FlashQ trigger with Nissin i40 for Sony. Unfortunately it does not work…like with all Sony flashes.


    • Author
      Flash Havoc 7 years ago

      Hi Mat,

      Thanks for the feedback.

      That’s a bit of a pity about the Sony flashes. I don’t know if this is something FlashQ are working on or will be able to fix in future or not.

  8. alex 7 years ago

    I try to shoot the i40 out the camera with different trigger unsuccessfully, my camera is a Sony A7, but I think the problem is in the Nissin flash… as I have done with other flashes … someone could shoot the flash off the camera? using triggers or the ADI/ P-TTL mode

    • Author
      Flash Havoc 7 years ago

      Hi Alex,

      Sorry I don’t have the i40 flash yet. Hopefully others may provide some feedback with this.

      The original Nissin Di622 flash would not fire with any radio triggers, and Nissin fixed that with eh Di622 II. So hopefully they wouldn’t repeat the same issue with the i40 (and all radio triggers).

  9. Adam de-Ste-Croix 6 years ago

    You have twice mentioned that this flash has HSS but I see no button for it and their own website doesn’t state it.
    I’m looking for a compact TTL flash with HSS for the Sony A7ii.
    Please could you let me know if this does have HSS or what my other options are if not. Thank you.

    • Author
      Flash Havoc 6 years ago

      Hi Adam,

      The Nissin website states “Supports up to 1/8,000 seconds shutter speed”, with the exception of the Fuji version. B&H Photo etc describe it as having High Speed Sync.

      You may have to download the manual to see if there is any way to activate it manually, though it may activate automatically with higher shutter speeds.

      I’m not really familiar with the other options for Sony, apart from the genuine Sony flashes sorry.

  10. Pitsanu 6 years ago

    You can trigger the Nissin i40 with a FlashQ receiver if you put the flash on a Sony ADP-AMA flash adapter (for using flashes with the new Multi-Accessory-Shoe on “old” Sony/Minolta sockets)

  11. JRM 5 years ago

    I have the Nikon version of the i40. It’s small, lisghtweigth, powerfull enough, i-TTL compatible, easy to dial compensation, can be easily bounced and with the built in catch light and wide diffuser and the omni diffuser it’s easy to get well lit shots.
    Trying to answer some questions: in the manual says that the “A” mode is “Automatic mode: flash light is totally controlled by the camera for the most adequate exposition”. It looks like a TTL but without exposure compensation, and it says that in the user manual when it describes further the flash modes.
    There are also 3 Slave modes that are a little confusing to me:
    SD (Slave Digital): it says that syncs the i40 with the master flash pre-flash (i-ttl or e-ttl)
    SF (Slave Film): it says that the i40 syncs with “the traditional single flash system” (I’m lost here)
    Wireless TTL Slave (3 groups): it says that the i40 syncs with the wireless optic master flash in one of the chanels A/B/C
    I know that it’s compatible with the new Nissin’s Air System but one have to buy both the commander Air 1 and the receiver Air R that have a cost of £120 (140€/147USD)… it’s a nice system and half price of the optical only Nikon SU-800 but still little too expensive. I hope that it’s compatible with Godox X1 as it’s half the price!

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