Broncolor Siros 400 L and Siros 800 L monolight review

The Broncolor Siros 400 L and Siros 800 L off powerful studio flash that you can take anywhere

Broncolor Siros 400 L and Siros 800 L monolight review
(Image: © Broncolor)

Early Verdict

Broncolor offers Swiss precision and long-term durability with its Siros L battery-powered monoblocs plus the convenience of remote control via WiFi. But price and the absence of TTL auto flash control will be deal breakers for many.


  • +

    Choice of 400Ws and 800Ws heads

  • +

    Rugged aluminium casings

  • +

    Excellent colour temperature control

  • +

    Flash-to-flash consistency


  • -

    Luxury price tag

  • -

    No wireless TTL exposure control

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    Heavy with battery fitted

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The professional lighting market is no longer as clearly defined as it once was. For starters, there’s a lot more choice, including speedlights in multi-head set-ups and continuous lighting, the latter now especially popular thanks to LEDs (and because digital cameras allow for white balance correction). Consequently, the ‘traditional’ studio lighting sectors of monoblocs and power packs face more competition than even before. The positive outcome all-round has been more design innovation, particularly in terms of taking monoblocs out of the studio setting and onto location… even to very remote places.

Compared to a speedlight, the flexibility of a battery-powered monobloc is undeniable with more power that’s able to be delivered over a wider range – giving shorter flash durations – and a lot more scope for light shaping via extensive systems of accessories. The downside is, of course, the increased size and weight, but improvements in battery technology are contributing to significant reductions in both, even compared to just a couple of years ago. So the lithium-ion pack for Broncolor’s new Siros L models weighs just 600 grams and slots into the top of the monobloc’s casing. Yet it’s good for 440 full-power flashes with the 400 joules model and 220 with the 800 joule version… and you’ll obviously get a lot more when shooting at the lower power settings which will often be the case. 

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