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Broncolor SIROS

broncolor SIROS monolight family


For over 50 years broncolor has refused to compromise on the quality of light.

In this sense, Siros is a true broncolor product. The Siros S includes the ECTC technology you know from our high-end Scoro and Move power packs. The enormous control range goes up to 9 f-stops, resulting in output as low as 2 ws which gives the photographer an unrestricted choice of aperture. 

And the lightning-quick charging time, 0.02 to 0 .90 s at 400 ws, means you never have to wait. broncolor offers the world's most comprehensive range of light modifiers, and Siros was built to be fully compatible with this system to provide unlimited creative possibilities.  

Two new reflectors have been developed especially for Siros: An umbrella reflector, which is equipped with a cover that also serves as transport protection, and a size-optimised reflector, the L40, with a snap-in system for mounting honeycomb grids.

Siros is fast.  With flash durations from 1/8000s (t0.1) or 1/13'000s (t0.5) and recycling times from 0.02 s you can capture every moment perfectly.

Siros is simple.
Operation using either the single rotary controller or the advanced app - both are intuitive.

Siros is powerful.
High light output, up to 800 ws, in a robust housing leaves no photographer standing in the dark.

Siros is Swiss.
Swiss precision and broncolor quality - inside and out.

Siros is family.
Siros is available in standard and S variations, and in 400ws and 800ws versions.





When "instant" counts, it is time for SPEED. In Speed Mode, you can set the fastest flash duration as the exclusive priority. When using Speed Mode, constant color temperature functions (ECTC) are suppressed.. The second generation of our patented ECTC (Enhanced Color Temperature Control) technology, which adapts flash voltage and flash duration to each other, achieves a constant color temperature over the entire output range.
Flash duration and light output are the two decisive factors in light control. A microprocessor in the Siros will calculate the shortest flash duration for a given output for you. This enables rapid flash sequences with up to 50 flashes per second. With Siros S, you have the choice of 9 F-stops to set the flash output you need - from the top power level all the way down to 2ws. .



Siros 400

Siros 800

Siros 400s

Siros 800s

Flash energy

400ws 800ws



F-stop at 2m distance,
100 ISO (6.5 ft)
with L40 reflector 22 5/10 32 8/10 22 5/10 32 8/10
with P70 reflector 32 5/10 45 6/10 32 5/10 45 6/10

Flash duration t 0.1 (t 0.5)





min energy 1/ 350s (1/1'000s) 1/150s (1/500s) 1/5'500s (1/11'000s) 1/4'000s(1/8'000s)
max energy 1/700s (1/2'100s) 1/350s (1/1'100s) 1/700s (1/2'100s) 1/350s (1/1'00s)

Charging time for 100% selected energy




230 V/50 Hz 0.1- 0.95s 0.2- 1.9s 0.02-0.95s 0.07-1.9s
120 V/ 60 Hz 0.1- 0.95s 0.14-1.9s 0.02-0.95s 0.04-1.9s

100 V/50 Hz

0.1- 1.45s 0.18- 3.1s 0.02-1.4s 0.08-2.9s
Control Range of flash energy

7 f·stops in 1/10 or full f·stop intervals

9 f-stops in 1/10 or full f-stop intervals






Color Temperature


ECTC technology

max energy /P70

5500K 5500K

Power requirements

Automatic adaptation to the mains (AC·Iinc) voltage 100- 120V/50- 60Hz: 5.5A, 200- 240V/50- 60Hz: 3.5A

Modeling light

Halogen max. 300W/ 120V, off. proportional to flash energy or full power

Flash Triggering

Manual release button, photocell, Sync cable, integrated broncolor RFS 2.1 receiver

Remote Control

via bronControl app for mobile devices

RFS 2.1 Transceiver or RFS 2.2 Transceiver

Ready display

Visual and audible (can be switched off)

Additional Functions

• Sequences up to 50 flashes

• Integrated umbrella mount and integrated umbrella reflector

• Speed Mode for fastest flash durations

• USB connection for software updates

• Power electronics temperature control
• Internal discharge when power is reduced


Fan, temperature controlled


12.6" x 5.1" x 7.1"

Weight 7.1lbs 7.9 lbs 7.1lbs 7.9 lbs



Siros 400 S Wifi / RFS 2.1$1,406.00
Siros 800 S Wifi / RFS 2.1$1,689.00
Siros 400 S Expert Kit 2 WiFi / RFS 2$3,085.00
Siros 800 S Expert Kit 2 Wifi / RFS 2$3,600.00
Siros 800 S Pro Kit 3 Wifi / RFS 2$5,454.00
Halogen Modeling Lamp 300w / 120v for Siros$35.00
Flash Tube 400 / 800ws for Siros$207.00