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  • Stelos: User Interface | Controls | Functions | Handling

The submenu: detailed description

Written by Axel Schmidt

Updated at September 1st, 2025

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                                This section explains each available function of the submenu in detail.

                                 

                                Modelling light

                                Use the upper control to adjust the light intensity and the lower control to adjust the colour temperature.

                                 

                                Flash

                                 

                                In principle, all flash modes listed in the table below can be selected.

                                However, depending on the selected power (flash energy), certain modes may not be available. In this case, the unavailable value is displayed in grey above the white value.

                                As soon as the user has set a power level that is compatible with the originally desired mode, the grey value will turn white again and move back down.

                                The power can be selected freely at any time.

                                The resulting flash duration is shown in the centre of the bottom line.
                                 

                                t0.1 min (‘shortest’) Shortest possible flash duration; for technical reasons, the flash colour temperature becomes more bluish.
                                Opt +800K *
                                Opt +700K *
                                Opt +600K *
                                Opt +500K *
                                Opt +400K *
                                Speed In ‘Speed’ mode, the colour temperature is slightly cooler (+300K), but remains constant across the entire energy setting range.
                                Only power levels 1.0 to 6.8 are available.
                                Opt +200K *
                                Opt +100K *
                                Opt (factory setting) This is the default setting.
                                Optimal colour temperature (daylight, typically 5800 Kelvin): Stelos calculates the flash duration so that the colour temperature remains constant across the entire control range.
                                Opt -100K *
                                High-Speed-Sync (HSS)

                                For outdoor applications.

                                With High Speed Synchronisation (HSS), you can use Stelos with any camera shutter speed, even those that fall below the shortest sync time (‘x-sync’).

                                The flash duration is fixed at 1/250s and the flash remains constant throughout the entire exposure process.

                                In HSS mode, you can set the exposure so that the surroundings appear rather dark and dramatic – yet you can still work with a wide aperture and therefore a shallow depth of field.

                                Only power levels 5.4 to 11.0 are available.
                                 

                                 

                                * Please note:
                                The colour temperature of the set energy can be influenced upwards or downwards in steps of 100K. With reduced power, the control range of the colour temperature adjustment increases. Due to the direct dependence of colour temperature and flash duration t 0.1, this is adjusted automatically and certain flash modes may not always be selectable. In the submenu under 'More', you can also change the unit of the flash duration to 't 0.5'.
                                 

                                 

                                Timing

                                The set delay value corresponds to the time between the flash trigger signal (e.g. by radio transmitter) and the effective (visible) flash. The maximum value is 50 seconds.

                                A sequence is a series of flashes or the preselection of a certain number of flashes. The maximum value is 100.

                                Interval is the time between two consecutive flashes. The maximum value is 10 seconds. The value can only be edited for sequences of ≥2.

                                Pressing "Reset" briefly resets all parameters in this submenu to the factory settings (including alternate settings).
                                 

                                 

                                Studio / Sync

                                In this submenu, define how flashes are to be triggered:

                                RFS on The trigger signal is transmitted by radio.
                                RFS off No trigger signal via radio.
                                Studio address Set a number between 1 and 99.
                                You must also set the selected number on your broncolor RFS radio transmitter.
                                If you switch to a different studio address, you may experience unwanted flash firings or radio interference*.
                                Lamp address

                                Lamp address:

                                The control range is 1 to 40.

                                The broncolor RFS 2.1, RFS 2.2 and RFS 3 radio transmitter systems allow you to control several groups of flash devices (one after the other).

                                The assignment to groups is based on the lamp address (this also applies to the bronControl app).

                                 

                                For more info, check out the relevant operating instructions:

                                •    RFS 2.1
                                •    RFS 2.2
                                •    RFS 3
                                •    bronControl app

                                Cell sensitivity low Flash triggered by light pulse active.
                                The photo cell sensitivity is low.
                                Cell sensitivity high Flash triggered by light pulse.
                                The photocell sensitivity is high.
                                Cell off No flash triggered by light pulse.

                                 

                                *In the event of problems and undefined malfunctions of broncolor RFS devices, strong frequency interference may be disrupting radio communication between the devices. In this case, find a better location for your devices to avoid possible frequency interference from baby monitors, video bridges, microwaves, cordless DECT phones, WLAN or Bluetooth devices, or use a different studio channel.

                                If you set the same studio address on several broncolor flash units (and on the RFS radio transmitter), they will all respond to the commands from the radio transmitter.

                                RFS and cell can also be active at the same time.
                                Alternatively, you can also trigger the flash via the built-in sync socket (wired method).

                                Tip:
                                The sync socket is always active.
                                The sync cables (item no. 34.111.00; 5 m) and (item no. 34.112.00; 10 m) can be plugged into the sync socket for triggering via cable.
                                 

                                 

                                More

                                In this submenu, you can configure Stelos according to your individual preferences. In particular, the home view can either visualise everything at a glance or be very minimalistic.

                                 

                                Display -    Brightness (6-100%)
                                -    Orientation (0° or 180°)
                                -    Screen saver (10s, 30s, 60s, never)
                                -    Show / hide flash duration on home view
                                -    Show / hide RFS icon on home view
                                -    Show / hide cell icon on home view
                                -    Show / hide WiFi icon on home view
                                -    Show / hide studio address on home view
                                -    Show / hide lamp address on home view / display in colour of Cognition Light
                                Cognition light On / off
                                Flash duration t 0.1 / t 0.5
                                Beep 
                                (acoustic ready signal for flash firing)
                                quiet / medium / loud / off
                                Auto update on / off

                                 

                                 

                                 

                                WiFi

                                Here you can switch WiFi on or off. The status is also displayed ('disconnected' or 'connected') and available networks can be displayed. After clicking on an available network, the password must be entered using the integrated keyboard. Known networks can be displayed and 'forgotten' again.

                                 

                                 

                                Language

                                Stelos offers 11 menu languages. The factory setting is 'English'.

                                CHN Chinese Simplified
                                EN English
                                ESP Spanish
                                FRA French
                                GER German
                                ITA Italian
                                JPN Japanese
                                KOR Korean
                                NLD Dutch
                                POL Polish
                                POR Portuguese

                                 

                                Info

                                Flash counter Shooting Number of flashes triggered per shoot (can be reset)
                                Total flash counter Total number of flashes triggered (cannot be reset)
                                Tag ('device name') Used for identification when using multiple Stelos in the bronControl app.
                                IP  IP address
                                MAC  MAC address
                                Version Currently installed firmware version
                                Check for updates Click on 'install' to install any updates found. The device will then switch off and must be switched on again manually.
                                Alarm

                                Any faults are listed here. In addition, the following pictogram is displayed in the status bar:

                                The pictogram can be orange or red; when red, the device can no longer flash.

                                A sound also alerts you to the fault (not if the setting under 'More | Beep' is set to 'OFF').

                                 

                                 

                                Reset

                                "basic" The settings of all submenus are reset to their default values, with the exception of studio address, lamp address, language and WiFi password.
                                "factory" Everything is reset to factory settings; you must confirm by clicking first.
                                "--" "--"    This allows you to cancel the reset process.

                                 

                                stelos functions stelos submenu stelos flash settings stelos flash mode

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