Inon S-2000 S-TTL Underwater StrobeInon has produced a very small but powerful strobe in the S-2000 model! It measures in at 2.5" width X 3.3" Height X 4.2" Depth.Inon,, S-2000,, S-TTL,, Underwater,, Camera,, Strobes2000, s, 2000

Inon S-2000 S-TTL Underwater Strobe

Inon has produced a very small but powerful strobe in the S-2000 model! It measures in at 2.5" width X 3.3" Height X 4.2" Depth.

SKU: # in-s2000

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Price $365.00

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Overview / Product Description

Inon S-2000 S-TTL Underwater Strobe


Marginally downsized with high-performance

64mm / 2.5in x 83.1mm / 3.3in x 106.5mm / 4.2in (W x H x D). Successfully designed world smallest body size as 4AA operated underwater strobe (*1) with its optimized inner components layout and trimming off unnecessary space. Best suits with a compact digital camera, supporting digital SLR camera with its mobility, incredible compact size even as dual strobes and high performance. The S-2000 totally changes underwater strobe concepts.

(*1) As of March 2009 among 4AA operated underwater TTL strobe (data by INON INC.)

Not only compact strobe

The S-2000 is operated by 4x AA batteries to provide fundamental features of strobe though 4x AA batteries operation is hostile to downsizing. The same level of basic features and durability as the D-2000 and marvelous high performance are driven with its compact body. Together with powerful and substantial Guide Number 20 (*2), the S-2000 benefits you with fast recycle time (minimum 1.5sec. at full flash) (*3) and remarkable flash capacity thanks to less inner wiring and efficient component parts. In addition to reliable and super accurate S-TTL Auto mode mode, 12 step Manual mode supports professional lighting. Other features include the EV. Controller to make fine adjustment when shooting in S-TTL Auto and auto-switching function to accommodate to various pre-flash type (single or double pre-flash) digital camera.

(*2) Measurement in air/ISO100m, Nominal value

(*3) When using "eneloop" or other compatible NiMH batteries.

Next generation wireless TTL function

The S-2000 strobe has ultra sensitive slave sensor which is 100 times more sensitive comparing to the slave sensor of D-2000 Type 3 strobe and successfully enables to support wireless S-TTL Auto flash control without using an Optical D Cable. Also the sensitivity of the slave sensor dramatically lengthens synch range of Manual flash mode. The package includes a Wireless Connection Kit which optimizes built-in flash light reception at the slave sensor. It is easy to use wireless S-TTL Auto shooting simply attached the strobe on compatible underwater housing via INON Shoe Base Set or Grip Base D4. You can enjoy shooting vivid underwater world with powerful external strobe with holding a rig one hand. Using Optical D Cable connection ensures more reliable flash sync in severe condition with bright ambient light like just under surface.

Unlimited expandability with optical cable system

The "S-2000" strobe is equipped with a connector mount on the front side to receive TTL signal of the strobe. One "S-2000" strobe can be linked to maximum two strobes via optical cables and operate them in [S-TTL Auto mode]. This optical cable system benefits you to add [S-TTL Auto] operating strobe easily by connecting with an optical cable to pick up S-TTL control signal is piched up from your camera system. This expandability makes underwater studio with perfect lighting real.

Natural color even with a diffuser

Beam angle without a diffuser is 105_ x95_ which increase to circular 100_ with supplied -0.5 White Diffuser for S-2000. The diffuser is made from customized material not to change color of strobe light where strobe color temperature drops only 100K (Kelvin). You can have same color tone between macro shooting without the diffuser and wide shooting with the diffuser to widen strobe beam angle.


ModelINON S-2000
Strobe Control Mode (*1)S-TTL Auto / Manual / TTL Auto (*3)
Connection (*1)Wireless connection / Optical D Cable / Optical D Slave Cable
Guide Number (*2)20 [without a diffuser]

17 [with supplied -0.5 White Diffuser]
Settable Flash Output (*2)20(FULL) 17(-0.5) 14(-1) 12(-1.5) 10(-2) 8.4(-2.5) 7.1(-3) 5.9(-3.5) 5.0(-4) 4.2(-4.5) 3.5(-5) 3.0(-5.5)

(12 steps in 1/2EV increments)
Beam Angle105_(horizontal) x 95_(vertical) [without a diffuser]

110_ x 110_circular beam [with supplied -0.5 white diffuser]
Color Temp.5500K [flash light, without a diffuser]

5400K [flash light, with supplied -0.5 white diffuser]
Recycle Time

Approx. 1.5 seconds minimum: ["eneloop" batteries (*6)]

Approx. 1.5 seconds minimum: [NiMH batteries (*7)]

Approx. 1.6 seconds minimum: [Alkaline batteries]

Approx. 2.1 seconds minimum: [Lithium 1.5V batteries]
Flash Capacity

Approx. 450 flashes: ["eneloop" batteries (*6)]

Approx. 570 flashes: [NiMH batteries (*7)]

Approx. 430 flashes: [Alkaline batteries]

Approx. 670 flashes: [Lithium 1.5V batteries]

AA "eneloop"(HR-3UTG) x 4, or "new generation"NiMH batteries x 4 (*6)

AA NiMH x 4 [good quality] (*7),

AA Alkaline x 4,

AA Lithium (1.5V) x 4

*Manganese batteries not compatible
DimensionsDiameter: 64mm / 2.5in Height: 83.1mm / 3.3in Depth: 106.5mm / 4.2in

(*Including Slave Sensor and Arm Base)
Weight[air] 295g / 10.4oz (without batteries)

[underwater] Approx. 69g / 2.4oz (with 4 "eneloop" batteries)
Working Temperature0_C - 30_C / 32_F - 86_F [water temperature]
Storage Temperature0_C - 30_C / 32_F - 86_F [air temperature] +50_C / 122_F (temporary allowable temperature limit)
Depth Rating100m / 328ft
Body Material / ColorPolycarbonate resin / red
Package Contents-0.5 White Diffuser, Magnet, Magnet Screw, Spare O-ring (Battery Box), INON Grease, Wireless Connection Kit
  • (*1) Flash modes / connection method is vary depending on camera system. Also flash mode is vary depending on connection method. Please refer to respective sections of the user manuals for detail.
  • (*2) Measurement in air / ISO100 _ m, Nominal value
  • (*3) Only compatible when connecting to TTL operation INON strobe (*8) by "Optical D Slave Cable Connection".
  • (*4)Measured with FULL strobe output at 30-second intervals with both Focus Light (Z-240,D-2000) and Advanced Cancel Circuit OFF, at 25 _C / 77 _F giving 10 minutes cooling period every 50 flashes.
  • (*5) Recycle Time / Flash Capacity / Focus Light operable duration (Z-240,D-2000) based on INON test data. Actual values may vary depending on battery manufacturer, battery type and age.
  • (*6)Including listed "new generation" NiMH batteries ("eneloop" type) having less self-discharging and heat generation charactistic comparing to "conventional" or "high-capacity" NiMH and confirmed compatibility by INON INC,.
  • (*7) Some "conventional" or "high-capacity" NiMH rechargeable batteries have significant self-discharge and heat-generatinmg characteristic resulting difficulty to keep their performance during usage. We recommend to use recommended batterie.
  • (*8) S-2000, Z-240, D-2000, D-2000S, D-2000W, D-2000Wn
Test Battery:

"eneloop"battery: SANYO "eneloop", HR-3UTG, 1.2V, Min.1,900mAh, Typ.2,000mAh
NiMH battery: SANYO Twicell 2700 Series,HR-3UG,1.2V, Min.2,500mAh, Typ.2,700mAh
Alkaline battery: Maxcell ALKALINE ACE, VoltageLR6(T), 1.5V
Lithium battery (1.5V): FUJIFILM/Energizer LITHIUM,FR6, 1.5V

New generation NiMH batteries

SANYO Electric Co.,LtdModel name: "eneloop"[recommended]

Model code : HR-3UTG
SONY Corp.Model name: Cycle Energy Blue

Model code: NH-AA-2BKA,NH-AA-4BKA
Panasonic CorporationModel name: Rechargeable Ni-MH(AA)

Model code: HHR-3MPS
Maha Energy CorporationModel name: IMEDION

Model code: MHRAAI4
GP Batteries International LimitedModel name: ReCyko+

Model code: 210AAHCBE
ANSMANN AGModel name: maxE

Model code: 5030991, 5030992, 5035052
Electrochem Automation Inc.Model name: NEXcell energyON

Model code: n/a(AA 2000mAh)


Inon strobes should only be powered with Sanyo Eneloop Rechargeable Batteries. Other rechargeable battery types will create excessive heat and may damage the strobe.


There are operational limitations on the number of repeated flashes and length of use of the target or "focus" light with this strobe. After such usage there is a required cool down period during which the strobe must be powered off. A flyer is included in the box with each strobe with specific information regarding these limitaions. If you have any questions about these limitations please feel free to contact one of our staff.