The Broncolor Siros 400 L Outdoor Kit 2-Light Battery-Poweredis the latest in the Siros series of monolights. Powered by a Li-ion battery, the flash head gets up to 440 full-power flashes on a 70-minute charge. The modeling light is a 25W LED to conserve battery power.

Speed is central to the design of the Siros L. Recycling is a lightning fast 0.03 to 1.2 seconds, while normal t0.5 flash duration is as short as 1/11300 sec. There's also a Speed Mode that bypasses the Siros L's Enhanced Color Temperature Control to prioritize short flash durations and fast recycle speeds. The result is a flash duration of 1/19,000 at minimum power: fast enough to freeze water droplets and other stop action effects. The Siros L has a 9-stop variable power range from full power all the way down to 2 Ws. While at higher settings it's possible to out-flash the sun, lower settings allow use of even the widest apertures for your desired effect. All functions are available on the simple, intuitive panel via an ergonomic rotary controller, but you also have access to the menus and controls of up to 6 units using your tablet or smartphone and the free bronControl app.

The Siros 400 L features Broncolor HS for syncing at shutter speeds up to 1/8,000s. Broncolor HS requires an RFS2.2 transmitter, available for Canon, Nikon, and Sony cameras. Existing Siros owners should ensure that their lights have the latest user-upgradable firmware, available online at www.bron.ch/sirosfirmwareupdate/.

2 x 400Ws Flash Heads    440 Full-Power Flashes    Li-Ion Battery    70-Minute Recharge    0.03 - 1.2 Sec Recycling    Speed Mode Flash Duration: 1/18000 Sec    9-Stop Flash Range    Built-In Wi-Fi and RFS Receiver    bronControl App    Up to 50-Shot Flash Sequencing

A single fully-charged lithium-ion battery stores enough energy for a Siros 400 L to flash more than 440 times, and it does that at maximum power.

In only 0.03 seconds, your Siros L is ready again. The flash duration can as fast as 1/9000 sec (t 0.1) or 1/19000 sec (t 0.5).

Flash duration and light output are the two decisive factors in light control. A microprocessor in Siros L will calculate the shortest flash duration for a given energy setting.

In Speed Mode, fast charging and short flash times have absolute priority. In this case, the calculation of constant color temperature (ECTC) is suppressed for quick results.

Very simple operation using the single rotary controller. Alternatively, you can use the advanced, intuitive app.

The high light output leaves no photographer standing in the dark. It can even challenge sunshine. And with a control range of 9 stops, you can still use wide-open apertures when needed.

With its low power consumption, the 25-watt LED module provides bright modeling light at a color temperature of 3200K. The light characteristics are absolutely comparable with the modeling light from a mains-operated Siros S.

Related Questions and Answers

Q: 1. How do I meter the power output in HS mode? Do I need a special light meter or a regular flash meter will work?

A: Some third-party meters (e.g. Sekonic) offer the ability to meter in HS mode however we have not tested these units.

Q: 2. what's diameter size?It can fit 7 honeycomb grid ??

A: I was interested to check on this since I have about a dozen standard (I think Speedotron) grids in the studio and I didn't really want to spend the money for the Bron grids. Turns out those standard grids fit and stay in place if I bend the spring outward and extra 1/2 inch. The opening of the L40 is about 6 & 7/8th inches (75mm). My standard' grids are about 6 & 5/8th (68mm) depending on how round they are after years of use. I have used them in Speedo, Hensel and Profoto grid reflectors. So they are a little small, but bending the spring outward a bit does the trick. If I was pointing the head down, I'd put a piece of gaffers tape on it for extra security.

Q: 3. do the stands include in this kit?

A: No stands, I was disappointed when mine arrived, the lights are amazing, but its bad it advertises stands in the photo

Q: 4. Is this enough to light a 120 x 180 cm Softbox?

A: Yes. More than enough power to illuminate a 120x180 cm.

Q: 5. Can this kit work in the studio with the power outlet instead of using the battery? And is there going to be an education price for this kit soon or later?

A: Unfortunately, this monolight system is only for use with a battery and cannot be plugged into AC power. As for student pricing, that would normally be posted on our EDU Advantage home page as the pricing becomes available. It would be best to check back to that page periodically for updates. http://bhpho.to/11A01z5

Q: 6. It is possible to use connected to the grid?

A: It is possible to use grids with this monolight with the help of the Broncolor Standard Reflector for Siros and Siros L Monolights B&H # BRRL40 and the grid set for it which is the Broncolor Honeycomb 3 Grid Set for L40 Reflector B&H # BRGS3L40. Please see the images below for reference.

Q: 7. Hey is this specific light good foR starters?

A: The Broncolor Siros 400s is a very good strobe. It is not a beginner strobe but is good for beginner to professional use.

Q: 8. Can I connect a PocketWizard to this?

A: Yes. The Siros L has a sync port which can be triggered by a plugged in receiver.

Q: 9. What mount does this strobe use?

A: This strobes utilizes the Broncolor Pulso mount, which will fit the current line up of Broncolor modifiers.

Q: 10. Does this strobe have TTL?

A: No, just High speed sync with Optional Transmitter