S4 mark 2 – efficient lenticular 65W LED panel

S4 MK2 – efficient lenticular LED panel with replaceable optics for reporters


The aluminum illuminator with dimensions of 30×26 cm is a new incarnation of the smallest panel of the Akurat S series. The panel is more than twice as powerful as its predecessor S4bi and has an essentially greater beam of light. The CCT range has been extended to the 2700-6500 Kelvins. The Mark 2 also features a completely new light control by the multifunction encoder knob.

The optical system consists of 4 interchangeable TIR lens units, placed on magnetic holders, which shape the two basic photometric parameters of the luminaire – the angle of the light beam and the maximum illuminance achieved.

Basic parameters:

  • Maximum luminous flux approx. 6000 lumenów
  • Maximum illuminance up to 12’800 lux @ 1m
  • Light beam angle 30, 60, 90 or 120 degrees
  • CRI Ra=97+, TLCI 99-100
5 MBTechnical Specification S4 MK2


  • S4MK2_front
  • S4MK2_side
  • S4MK2_back_angle_view
  • S4MK2_back
  • S4MK2_terminals_close_up
  • S4MK2_60deg
  • S4MK2_60deg_close-up
  • S4MK2_lens removal
  • S4MK2_lens_assembly
  • S4MK2_lens_putting_on_2
  • S4MK2_30deg
  • S4MK2_30deg_close-up
  • Snapbag_S4MK2_front_diffuser_open
  • Snapbag_S4MK2_back02
  • S4MK2_2xPanD
  • S4MK2_GoldMount
  • S4MK2_V-Lock
  • S4MK2_back_velcro_tapes
  • S4MK2_wo_AC_Adapter
  • W-DMX_RX_on S4MK2_2
  • W-DMX_RX_on S4MK2_1

Find out more


Thanks to the use of modern multichip and multi-phosphor LEDs with high CRI and TLCI and very efficient converters powering the LEDs, it was possible to increase the lamp power and obtain a strong stream of high-quality soft light, completely free of the flickering. New LEDs enable a wider CCT range, from 2700 to 6500K.

Fixed with magnets, replaceable optical system allows for a rapid change of photometric parameters of the lamp, in a very wide range.

A modern controller with an LCD display allows you to set light parameters using a convenient knob. The controls are simple and intuitive, allowing the operator to concentrate on the job.

All MK2 panels, unlike previous versions, are factory-equipped with a DMX decoder. It is also possible to control the lamp wirelessly, using dedicated W-DMX communication modules.

There is also available a dedicated “Snapbag” softbox from DoPchoice.




The S4 luminarie is equipped with 4 TIR lens assemblies as standard. Thanks to the possibility of replacing the lenses, the user can adjust the photometric parameters of the fixture to the current needs. It is possible both to illuminate wider sets from a short distance, and to achieve significant illuminance in smaller areas. The magnetic lens mount allows for a very quick change without the use of any tools. S4 MK2 luminaries with lenses fixed with screws are also available. We strictly recommend this solution if the luminaries are to be permanently suspended from the ceiling.

There are three types of lenses with angles of 30, 60 and 90 degrees. After removing the lenses, the luminaire emits a beam of light with an angle of 120 degrees. The table below shows the photometric parameters of the S4 MK2 depending on the optics used.







MK2 Controller

Akurat MK2 panels are equipped with a completely new controller. The parameters of the light are regulated by a large, comfortable, multifunctional knob. Pushing the knob switches the parameter to be adjusted, turning it changes its value. The adjustment is made in steps depended on the turning speed of the knob, which enables achieve a large jump in the case of fast turning, or fine tuning in the case of slow rotation.

Przyciski Tungsten and Daylight buttons allow you to instantly set the standard CCT light

The controller is equipped with a DMX 512 signal decoder. It is also adapted to wireless control in the W-DMX system by additional communication module.



Remote Control

The DMX512 signal is connected to the lamp with a RJ45 plug. DMX terminal is equipped with two slots to build a standard DMX network a “daisy chain”. These inputs are not isolated. If the fixture is used in more complex networks that require optoisolation, the Akurat DMX XLR Plate module should be used. Ask your dealer for a quote.

The MK2 DMX terminal is also equipped with a USB socket for connecting the wireless control module of the W-DMX system. There are both dedicated receiver modules for panels and transmitting modules for connecting to the output of any lighting controller operating in the DMX512 system.

After connecting the signal, the controller automatically switches to DMX mode. The setting of the DMX channel is made using the multifunctional knob. The newly selected address is automatically saved in the controller’s non-volatile memory.




Battery operation

A wide range of Battery Plates is available, allowing the lamp to be powered from camera batteries. You can choose between V-Lock, Gold-Mount and six types of 7.4V batteries from leading camera manufacturers: Canon BP (camera), JVC BN-VF8, Panasonic CGA-D, CGR-D, Panasonic VW-VBG6 , Sony NP-F, Sony BP-U.

MK2 panels are delivered with the power supply attached to the AC Adapter plate with Velcro tape. The battery plate is installed by the user in place of the AC adapter. The manual and the TX08 tool are attached to the Battery Plate.




The main advantages of the S4 MK2

  • The possibility of changing the photometric parameters of the luminare by quickly replacing the optics mounted on magnetic catches
  • The ability to achieve powerful illuminance or illuminate a large area up close depending on the lenses used
  • No flickering effect, the ability to illuminate sets filmed in Slow Motion mode without restrictions
  • The ability to smoothly adjust the CCT and switch between standard daylight/tungsten lights
  • The ability to dimming from 0 to 100%
  • Intuitive operation
  • Built-in DMX512 decoder, the possibility of wireless control in the W-DMX system (option)
  • Display of the current CCT in Kelvins, dimmer as a percentage and battery voltage in Volts
  • Possibility of power supply from popular NP-F batteries or other camera batteries, also V-Lock and Gold Mount
  • High efficiency and low operating temperature
  • Housing made of aluminum
  • High mechanical, shock and moisture resistance
  • Reliability


See also