We wish all our customers, old & new alike


A Happy New Year.



Our webstore is remaining open.



Happily our online store is still open for all online orders.

Where stock allows we will honour all orders, plus process and despatch the same day.
If your order is urgent we recommend you call us (01749 813044) or email info@aj-s.co.uk


During this time for the safety of our staff and customers we will follow all goverment guidelines.

We trust that 2021 will be better for us all.



Thank you.



We wish all our customers old and new that they keep safe and well during these unprecedented times.

Broncolor Siros 400 L WiFi / RFS2 Monolight (31.710.12)

Price: £2,018.00
Weight: 5.000 Kgs
Code: 31.710.12

The Siros L is broncolor’s new battery-powered compact device. The Siros L provides ambitious photographers with the opportunity to enjoy perfect lighting, be this on-the-move, in the studio or outdoors.

Offering up to 440 flashes at full power, colour constancy and very fast flash durations, the Siros L is one of the most powerful compact devices currently available on the market.

Features include:

  • Latest lithium-ion battery technology
  • Enormous control range for flash energy – up to 9 f-stops
  • Remote control using “bronControl” app or RFS2
  • Speed mode for fast flash times
  • Additional function for flash sequences
  • USB connection for software updates
  • Easy-to-use rotary controller and simple operation

  • Place an order for £480.00 + Buy Broncolor Siros 400 L WiFi / RFS2 Monolight (31.710.12) or other a product from our Promo Selection to get free shipping.

 Shipped direct from our supplier – usually held in stock, but please contact us for an accurate ETA

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For over 50 years broncolor has been synonymous with innovation and an uncompromising commitment to the highest light quality. And again, with the Siros L, there are no trade-offs. It is a real broncolor product.


With the latest lithium-ion technology, a single battery, in spite of its very compact size and low weight, can charge a Siros 400 L up to full power 440 times! Reduce the output, for example by just 2 f-stops, and you can have over 1700 flashes! The results will convince you. The battery can be used over a very wide range of temperatures – from −10° C to +60° C degrees Celsius. This gives you a free range of locations – at the North Pole or in the desert, Siros L is your reliable companion.


When discharged, this high quality battery takes only 70 minutes to fully charge again. In Siros L too, the ECTC technology you know from our high-end Scoro and Move power packs controls the flash curve, enables flash durations from 1/19’000 s (t 0.5). In addition, it guarantees constant colour temperature over the entire control range.


Simple, robust and ergonomic
The proven design of Siros studio units has been optimised for the battery version. The lithium-ion battery can be easily removed and replaced with one hand. It is perfectly integrated into the elegant form of the unit – the latch is slightly raised so that even in the darkest studio you can reliably locate it by touch. Three LEDs reliably indicate the battery’s state of charge.


The stand adapter is designed so that it combines with the generously dimensioned handle to act as a floor stand. The umbrella mounting is located directly beside the stand adapter. This lets you use the entire length of the umbrella shaft for focusing.


Perfect light without restrictions
The control range extends over a full 9 f-stops. At high output it can even “outflash” bright daylight. Low settings enable photography even with wide-open apertures. You can be certain that Siros L will never restrict your choice of aperture – it is every photographer’s ideal companion.


Many broncolor light shapers are parabola-shaped and only guarantee optimum light yield and quality when the light source is as close as possible to the internal focal point of the reflector. Consequently, the Siros L is built with an external flash tube, resulting in perfect light without compromises.


broncolor has the most comprehensive light-shaper accessory system, which the Siros L is completely integrated into it. Two new reflectors have been developed especially for Siros: an umbrella reflector and the L40 reflector, which has a snap-in system for honeycomb grids or barndoors with filter holder.


Operation: as simple as possible for maximum convenience
All the basic functions of Siros L can be operated using the free “bronControl” app. As soon as Siros L is logged in to the Wi-Fi network, you can control several devices using a smartphone or tablet with each clearly identified by different-coloured LEDs.


The app controls the functions of up to 6 units with absolute clarity and full individual control. Even without the app, Siros L is still simple and intuitive to operate. With the single rotary controller, the “Twist Function” lets you set the output very quickly over several f-stops or very precisely in 1/10 f-stop steps. By pressing on the same knob you have access to the menu and to all the additional functions. There’s no simpler way.


To control the Siros L with iPhone, iPad or Android devices. App is available on the App Store and Google Play Store.


Innovative Technologies, Made in Switzerland
You can sense the performance and robustness of Siros L from afar. The elegant, black aluminium body of Siros L makes a powerful statement, but its simplicity and ease of use are equally impressive.


Siros L was entirely designed and developed in Switzerland. Production and quality control also remain at the headquarters of Bron Elektronik AG and so guarantee the familiar high quality of every broncolor device.


Innovative technologies from the prize-winning Scoro and Move power packs have been adapted to the Siros L. These include:


Cut-off technology
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. That is convenience!


Constant colour
The second generation of our patented ECTC (Enhanced Color Temperature Control) technology, which adapts flash voltage and flash duration to each other, ensures a constant colour temperature over the entire output range. Reliability at the highest level.


Enormous range of settings
With Siros L you have a free choice of 9 f-stops to set the flash output you need, all the way to 2 Joules. Photography with maximum freedom.


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


Lithium-ion battery
The latest lithium-ion technology in the batteries enables charging times never achieved before, and supplies energy for over 440 complete charges to full power – and all this from a weight of only 0.6 kg. It makes photography pure pleasure.


Other features:

  • Sequences (flash series) up to 50 flashes
  • Integrated umbrella holder and umbrella reflector included in scope of delivery
  • USB connection for software updates
  • Speed mode for fastest flash duration

Kit includes:

  • 1x Siros L head
  • 1x battery charger
  • 1x lithium-ion battery
  • 1x Flash Bag 1.1

Note: Stands and transmitter are not included in the kit.

Energy:400 Ws
Energy range:9 f-stops (2-400Ws)
Energy control increments:1/10 or full f-stops
Recycling time (eco-mode):0.04–1.9s (for 100% of selected energy)
Recycling time (normal):0.03–1.2s (for 100% of selected energy)
Flash duration min. energy t 0.5 (t 0.1):1/11'300 s (1/6200 s)
Flash duration max. energy t 0.5 (t 0.1):1/1'200 s (1/400 s)
Colour temp.:5500K (constant)
Modelling light:25W LED (3000 K)
Power supply:Li-ion battery (28.8V / 2.5Ah / 72 Wh)
Battery capacity:440 at full energy
Flash release:Manual trigger button, photocell, sync cable, with integral broncolor RFS 2.1
Remote control:Using “bronControl” app for mobile devices or RFS 2.1 transmitter
Ready indicator:Visual and acoustic (can be switched off)
Height:18 cm
Length:32 cm
Width:13 cm
Weight:(with battery) 3.7 kg

Christmas Opening and Postage 2021










Final Postage/Dispatch

Because of the volume of parcels being handled by our couriers we cannot guarantee any next day delivery through December. If your order is urgent please order in a timely manner to ensure delivery on or before the date you require your delivery.


While all parcels are despatched on a next day delivery we will not guarantee any Christmas delivery placed after Friday 18th December. We will not guarantee any next day delivery or timed services during December.


Please note we are closed as of Wednesday 23rd 2020, 5:00pm until 9:30am Monday 4th 2021


Normal postage/dispatch will resume from Monday 4th January 2021


Note: Orders placed through our website from Wednesday 23rd at 3.00pm wont be processed until Monday 4th January 2021.


*We cannot guarantee next-day delivery during December as all couriers networks will be extremely busy. Please also be aware that certain items can't be posted through Royal Mail (including out-of-stock and oversized items). Please call us before placing any last minute orders.


For more information with the above dates, give us a call us on +44 (0) 1749 813044.



Christmas and New Year Holiday Hours
Monday 21st December 2020 - Open
Tuesday 22nd December 2020 - Open
Wednesday 23rd December 2020 - Open
Thursday 24th December 2020 - Closed
Friday 25th December 2020 - Closed
Saturday 26th December 2020 - Closed
Sunday 27th December 202- - Closed
Monday 28th December 2020 - Closed
Tuesday 29th December 2020 - Closed
Wednesday 30th December 2020 - Closed
Thursday 31st December 2020 - Closed
Friday 1st January 2021 - Closed
Saturday 2nd January 2021 - Closed
Sunday 3rd January 2021 - Closed
Monday 4th January 2021 - Normal opening hours resume


2020 has been a very tough year for many of our customers and others within our trade, but happily some sectors and clients still have continued to do strong business despite the challenging year and unprecedented times we have all experienced. So we'd like to take this opportunity to say thank you for all your help and support throughout 2020! We can definitly say that that if it wasn't for the support of our wonderful customer base we would not be here.


From everyone here at AJ's, we wish you a great Christmas and we hope to see you all in the New Year. We wish you all a happy and successful 2021 and trust that the situation improves for us all.


All the best,
Andrew, Hannah, Helen and Alex

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