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Sekonic L-758C-U Flash Meter

Cat # 401-761

The Sekonic L-758C-U is the the most advanced and precise multi-function light meter for Cine or Video, plus exposure calibration for still imaging.

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Overview Specifications Features


Items Include:

L-758 Case, Strap, Lens cap, USB cable, Syncro terminal cap, Sticker for multi-key and CS opertaions, Software in CD-ROM

The Sekonic L-758C-U is the ultimate light-measuring tool for cinematographers, videographers as well as digital still shooters. Offering the most extensive range of fps (frames-per-second), cine shutter speeds, and shutter angle settings, it meets and excedes the demands of Professional Cinematographers as well as Professional Still Photographers.


Weight0.6 lbs. (0.3 kg)
Exterior Dimensions3.8W X 1.9H X 6.7D in.
(9.7 X 4.8 X 17 cm)
TypeDigital exposure meter for ambient and flash light
Receptor HeadRotating Domed Head 90° to the right, 180° to the left, Retractable for Contrast Reading
Light Receiving MethodIncident light and reflected light
Receptor Incident LightConvertible to flat diffuser (Lumisphere in down position)
Receptor Reflected Light1° spot with display in finder
Light Receptor Element2-Silicon photo diodes (incident and reflected)
Reflected Metering Distance3.3' to infinity (1m to infinity)
Measuring Modes Ambient LightSimple illumination measurement (lux, foot-candle) Simple brightness measurement (foot-lambert, cd/m2) Aperture priority metering
Measuring Modes FlashWith synchro cord (cumulative and non-cumulative) - Without synchro cord (cumulative and non-cumulative) - Measurement using the optional wireless flash radio triggering system (cumulative and non-cumulative)
Measuring Range (ISO 100) Ambient LightIncident light: EV -2 to EV 22.9 - Reflected Light EV 1 to EV 24.4
Measuring Range (ISO 100) FlashIncident Light f/0.5 to f/161.2 - Reflected Light f/2.0 to f/161.2
Measuring Range Illuminance0.63 to 190,000 lux - 0.10 to 180,000 FC
Measuring Range Brightness1.0 to 980,000 cd/m2 - 0.29 to 290,000 foot lamberts
Repeatability (Repeat Accuracy)(+/-) 0.1 EV or less
Calibration Constant IncidentLumisphere C = 340, Lumidisc C = 250
Calibration Constant ReflectedK = 12.5
Display Range Film SpeedISO 3 to 8000 (in 1/3 stops)
Display Range Shutter Speeds Ambient30 min to 1/8000 sec (in 1, 1/2 and 1/3 stops) plus 1/200, 1/400
Display Range Shutter Speeds Flash30 minutes to 1/1000 second (in 1, 1/2, 1/3 stops) plus 1/75, 1/80, 1/90, 1/100, 1/200, 1/400
Display Range Aperturef/0.5 to f/161 in (1, 1/2 or 1/3 stops)
Display Range EVEV -9.9 46.6 in (1/10 stops)
Display Range Cine Speeds fps1, 2, 3, 4, 6, 8, 12, 16, 18, 24, 25, 30, 32, 36, 40, 48, 50, 60, 64, 72, 96, 120, 128, 150, 200, 240, 256, 300, 360, 375, 500, 626, 750, 1000 (shutter angle: 180°)
Display Range Analog Scale Aperturef/0.5 to f/64 (in 1/3 stops)
Display Range Analog Scale Shutter Speed 4 sec to 1/4000 sec (in 1/2 stops)
Display Range Analog Scale EVEV -7 to EV 7
Display Range Shutter Angle1° to 10° (in 1° steps) 15° to 270° (in 5° steps) plus 12°, 17°, 22°, 144°, 172°
Display Range Filter Factor Number Compensation85, n3, n6, n9, A3, A6, A9
Exposure Out of RangeEu (underexposure) or Eo (overexposure)
Memory Function9 readings
Average FunctionUp to 9 readings can be averaged
Flash Analyzing Function0 to 100% in 10% increments
Multiple Flash FunctionInfinite number of flash readings (Only one digit is displayed when the cumulated number is ten or more)
Calibration Compensation(+/-) 1.0 EV (in 1/10 stops)
Exposure Compensation(+/-) 9.9 EV (in 1/10 stops)
Custom Functions17 custom functions
All Weather FeatureJIS Standard Water Resistance Class 4, Splash Proof Type
Auto Power OffSelectable in Custom Functions
Battery Power Indicator DisplayIcon with 3 status
Auto IlluminationEV 6 and under
Second ISO Film Speed SettingISO 3 to 8000
Tripod Socket/Shoe Mount1/4" - 20 thread mount
Battery (Power)3V Lithium Battery Type CR123A
Diopter Adjustment(-)2.5 to 1.0D
Operating Temperature Range14° to 122° F (-10 to 50° C)
Storage Temperature Range(-) 4° to 140° F (-20° to 60° C)
Radio Triggering Radio TechnologyComplex 16/24 bit digitally coded w/ optional RT-32N Module
Radio Triggering Channels1 to 16 channels standard, 17 to 32 “Quad Triggering”, signal, selectable individual triggering
Radio Triggering RangeUp to 100 feet from transmitter to receiver
Radio Wave Frequency Europe (EU)CHCH16 433.62MHz
Radio Wave Frequency USA & Canada (FCC & IC)CHCH16 344.00MHz


Spot with Digital Display

  • The L-758C-Ufeatures a rectangular 1o parallax-free spot viewfinder. In dim or bright light situations, the L-758C-U spot viewfinder displays shutter speeds, aperture and more. The built-in spot meter measures both reflected ambient, flash or combined lighting. The optical finder also features an eyepiece with an adjustable diopter.

Shutter Angle

  • 1o to 10o in 1o increments, from 15o to 270o in 5o increments plus 12o, 17o, 22o, 144o and 172o individual settings

Cine Speeds

  • 1 thru 1000 fps. (frames per second)
  • Analog f/stop Display
  • f/0.5 to f/45 (in 1/3 steps)

Light Measurement Modes

  • Footcandle 0.10 to 180,000
  • Lux 0.63 to 190,000
  • Cd/m2 0.25 to 190,000
  • Foot-lambert 0.07 to 190,000
  • Ambient EV (Incident) EV -2 to EV 22.9
  • Ambient EV (Reflected) EV 1 to EV 24.4 (with 1o spot viewfinder) Flash (Incident) f/0.5 to f/161.2 Flash (Reflected) f/2.0 to f/161.2

Filter Compensation Settings

  • Selectable on ISO 2: 85, -n3, -n6, -n9, -A3, -A6, -A9 or +/- 5.0EV in 1/10 step increments for Incident and Reflected independently
  • Optional Plug-in Radio Transmitter Module
  • Electronic flash units and/or cameras can be triggered wirelessly with the optional plug-in digital radio Transmitter module (compatible with all PocketWizard Digital Radios). Simultaneous triggering and measuring of flash units up to 100 feet away is possible. With its new easy-to-use Selective Quad-Triggering control (4 zone lighting control), L-758C-U offers quick selection of which flash unit to trigger and measure independently with a touch of a key. Now you can individually measure several flash units wirelessly by the touch of the meter's measuring button, without walking over to each light and turning it on or off.

Memory Mode

  • Up to nine readings can be memorized and displayed on the analog scale independently in incident or spot metering modes in both Aperture and Shutter Priority Modes.
  • Using Memory recall and clear, you may review all memorized readings individually on main display and selectively delete individual readings, or clear all simultaneously.
  • Full, 1/2 or 1/3-step Selectable Readings
  • Both shutter speeds and apertures can be displayed in either full, 1/2 or 1/3-step increments plus 1/10 stop units to match your film or digital camera; selecting these increments is quick and easy with custom software menu settings.

Exposure and Calibration Compensation

  • Independent incident and reflected exposure compensation

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