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Sekonic L-758DR-U DigitalMaster

Cat # 401-756

The Sekonic L-758DR-U DigitalMaster is simply the most dynamic light meter you will ever own. It can record incident or degree spot-readings under ambient and/or strobe lighting down to a tenth-stop in accuracy.

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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

What moves the L-758DR-U DigitalMaster to the head of the class is that it's the only meter which can be calibrated to read light the way your particular camera system reads light.

Every camera system is unique. Optical, mechanical and imaging components all act on each other to produce slight differences in exposure and the dynamic range of the camera system. Sekonic helps you discover the differences in your camera system and use this information to control light, make better exposures and take better pictures than ever before.

By running an easy calibration test using Sekonic's L-758DR-U, one of Sekonic's Exposure Profile Targets (purchased separately) and the included Data Transfer Software (Mac & Windows), you can accurately profile the characteristics of your camera's imaging system to determine its true native ISO, dynamic range and clipping points.

After processing the test data and determining exposure parameters, the resulting data is uploaded from your computer via the included USB cable to the meter, where it is stored as camera profiles. Profiling data from up to three cameras can be stored in your meter for instant recall.


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 LightAperture priority metering
Measuring Modes FlashWith synchro cord (cumulative and non-cumulative) - Without synchro cord (cumulative and non-cumulative) - Measurement using the included 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
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 fps2, 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 (shutter angle: 180°)
Display Range Analog Scale Aperturef/0.7 to f/90 (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
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
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



  • Download: DTS Software for L-758 series

  • Profiles the specific sensitivity levels of your camera's imaging system for exacting light readings.

  • Exposures accurate down to a tenth-of-a-stop in full-stop mode for both ambient and electronic flash light readings with a repeat accuracy of +/- 0.1 EV. Meter can also display shutter-speeds and apertures in half or third-stop increments to mirror the exposure settings on your camera. Flash exposures can be recorded cumulatively or non-cumulatively.

  • Built-in degree spot meter features an adjustable diopter (-2.5 to 1.0d), and is threaded for 30.5mm filters and/or lens hood (a tethered lens cap is included). Large red LED characters display exposure data within the viewfinder allowing for real-time exposure referencing while maintaining continuous eye contact with your subject.

  • The L-758DR's incident swivels 270-degrees allowing you to 'walk the set' while maintaining constant visual contact with the meter's LCD display. Flash exposures can be taken with or without a tethered PC cord.

  • Up to 9 readings can be stored for meter averaging and contrast evaluations in aperture and shutter priority modes.

  • Mid-tone button allows you to shift the highlights or shadows to within the dynamic range of the profiled exposure reading. Warning flashes for out of range readings.

    Incident readings of three-dimensional objects are taken using the Lumisphere, which can be retracted for selective, narrower-field readings such as contrast ratio for flash lighting or for flat-field objects such as artwork.

  • For mixed lighting scenarios, the Sekonic L-758DR DigitalMaster displays the combined exposure values of both flash and ambient light sources, including the percentage of flash in total exposure in 10-percent increments.

  • Dual ISO buttons allow for quick exposure referencing when working with two differing film speeds, film and Polaroids, or other shooting scenarios involving dual ISO ratings.

  • A backlit LCD screen with large text and icons allows for easy referencing when ambient light levels drop below EV 6.

  • For wireless metering including Selective Quad Triggering - the included Sekonic RT-32n Radio Transmitter Module will wirelessly trigger PocketWizard-enabled flash systems within a 100' range from a choice of 32 channels.

  • Includes soft case, strap, synchro terminal cap, lens cap, Data Transfer Software, neck cord, CR123A lithium battery, custom function and multi-function charts (stickers).

  • Year Warranty, extendable at no charge to 3 years total (USA only) after registration, backed by our outstanding customer support team.


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