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Sekonic L-758DR DigitalMaster Flash Light Meter

Abel Code: SEK-401-758
Mfr. Code: 401-758
Estimated to Ship – 5-10 Business Days
Takes incident and reflected measurements of ambient and flash light. Sekonic L-758DR DigitalMaster is both a light meter and a flash meter.
Key Highlights
  • Flash/Ambient/Incident, Flash/Reflected
  • Radio triggering
  • 1-degree Spot Measuring
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The Sekonic L-758DR DigitalMaster Flash Light Meter incorporates a precise 1-degree, reflected light spot meter. Reflected light metering tells you about the subject. It is different from incident light metering in that it produces readings only for the middle of your camera's exposure range. Incident light readings offer the most direct way to determine exposure. Measuring the light falling on your subject delivers a rendering of the exact lighting situation. The reflected light metering expresses the edges.


  • Reflected Light Spot Metering
  • Incident Light Metering
  • Ambient Light Metering
  • Spot Viewfinder
  • Latitude Display
  • Memorize up to (9) readings for easy comparison
  • Built-in radio flash triggering
  • Flash analysis
  • Retractable Lumisphere
  • 1° Spot Measuring
  • Simultaneously measure flash and ambient lighting
  • All-weather design
  • Cordless mode for non-synchronized flashes

Reflected Light Spot Metering

The key to working with the L-758DR's spot meter is knowing the dynamic range of your camera. That is, the tonal range your camera is capable of recording. Program this into the L-758DR and you can easily know which details will be properly imaged and which will be over or under the range of your camera. Armed with this knowledge, you can make exposure decisions that take full advantage of your camera's imaging capabilities to produce pictures with greater tonality and clarity.

Incident Light Metering

Incident light readings are the simplest and most direct way to determine exposure. Since incident meters measure the light falling on your subject, they provide camera settings that render the image exactly the way it appears. Blacks are black. Grays are gray. Whites are white.

Retracting the Sekonic L-758's Lumisphere enables you to quickly judge the brightness of multiple light sources for fast, accurate adjustment of lighting ratios.

Ambient Light Metering

Take shutter-priority or aperture-priority readings from 30 minutes up to 1/8000 second and f/0.5 to f/128 and display them in full, 1/2 or 1/3 stop increments. Exposure is displayed both digitally and on an analog scale for easy readout. Settings can be changed after reading with automatic calculation to maintain the proper exposure. The extended sensitivity range, EV -2 to 22.9 (Inc) and EV 1 to 24.4 (Ref) for ISO 100, enables taking measurements over a wide range of lighting conditions.

Flash Light Metering

Shutter-priority readings of flash light can be made with your synch cord or cordlessly at shutter speeds from 30 minutes to 1/1000. The L-758DR automatically resets after each reading in cordless mode, to enable fast adjustment of flash brightness.


Today's High Dynamic Range (HDR) processing enables breaking through the limits to produce results never seen before. Knowing your camera's capabilities and precise exposure readings with the L-758DR will help you make right exposure settings and save you time in processing.

Built-in Radio Flash Triggering

Simply press the measuring button to wirelessly trigger flash units up to 100 feet away. The built-in transmitter offers 32 digital coded channels and Quad-Triggering Zones and is compatible with your PocketWizard radio triggering systems (except ControlTL), as well as the PocketWizard Wireless Freedom partners.

Flash Analysis

The L-758DR is especially useful for on-location shooting to lighten shadows or reduce background detail. That's because it measures ambient and flash simultaneously and automatically indicates the percentage of flash in the total exposure. You can easily adjust the ambient flash mix by turning the Jog Wheel. The digital display indicates the camera settings and an analog display shows the relationship between ambient and flash and the total exposure.

Entering Data

Download test images into computer. If shot in RAW, convert to TIFF or JPEG for computation. Enter ISO, incident, and reflected light shooting data. Then select and align images for processing and press OK to watch the Sekonic Data Transfer Software program graph the dynamic range of your DSLR camera. Save the data for transfer to the L-758DR.

Programming Meter

Switch OFF L-758DR. Connect it to the computer with USB cable and switch L-758DR ON. Select up to three camera profiles. Press transfer. Switch OFF L-758DR, disconnect, and switch ON to begin using.

Full Information Spot Viewfinder

The 1-degree spot meter has a broad reading range from EV 1 to EV 24.4 for ambient light and measures flash down to an amazing f/2.0. Its large, bright viewfinder with diopter correction and full-information data display give you everything you need to make the right exposure decisions without having to take your eye from the eyepiece.

Memory Mode and Latitude Display

Up to (9) readings can be memorized and displayed on the meter's analog display. Once programmed, the L-758DR's latitude display mirrors the dynamic range of your camera and is your guide to making exposure decisions that will get you the pictures you want.

Contrast Function

Use the L-758DR's contrast function to simplify measuring the brightness range of a scene. Spot meter a mid tone or take an incident-light reading and press the AVE/ΔV button to create a mid tone standard. Then press the measuring button to display the brightness difference between the standard and new reading. Knowing the dynamic range of your DSLR is vital to making the best use of this important feature.

Additional Features

Dual ISO - Enables instant adjustment or exposure readings for different ISO, filter factors, exposure factors, or exposure biasing.

Swivel Head - Turn to position incident dome properly while maintaining full view of the data display.

Illuminated Data Panel - Comes on at levels below EV 6.

All-Weather Design - Dust-proof and splash-proof (JIS Standard Water Resistance Class 4)

14 Custom Functions - 14 custom settings enable setting the display for full, 1/2 and 1/3 stop readout, adjust Latitude display, control functions, select displayed exposure modes and more

What's in the Box

  • 3-Year Limited Warranty
  • Soft Case
  • Data Transfer Software
  • USB Cable
  • Multi-Function Chart (sticker)
  • Custom Settings Chart (sticker)
  • Synchro Terminal Cap
  • Lens Cap
  • Strap
  • RT-32CTL Radio Transmitter Module
  • Sekonic L-758DR DigitalMaster Flash Light Meter


Key Highlights

  • Flash/Ambient/Incident, Flash/Reflected
  • Radio triggering
  • 1-degree Spot Measuring
  • Retractable Lumisphere
  • All-Weather Design


Operating Time:
60 hours for CR123A battery - with 3 level status icon


Meter Shutter Speed:
Ambient Light: 30 minutes to 1/8000 seconds (in 1, 1/2 or 1/3 stop) plus 1/200, 1/400
Analog Scale: 4 seconds to 1/4000 second (in 1/2 stop)
Flash: 30 minutes to 1/1000 second - (in 1, 1/2 or 1/3 stop) plus 1/75, 1/80, 1/90, 1/100, 1/200, 1/400
Meter Type:
Incident and Reflected Light
Meter Display Range:
Ambient Light - Incident light: -2 to 22.9EV
Ambient Light - Reflected light: 1 to 24.4EV with 1° spot viewfinder
Ambient Light - Repeat Accuracy: +/- 0.1 EV or less
Analog Scale - Aperture: f/1.0 to f/128 (in 1/2 stop)
Aperture: f/0.5 to f/161.2 (in 1, 1/2 or 1/3 stop)
Flash - Incident light: f/0.5- f/161.2 (approx. f/175)
Flash - Reflected light: f/2.0 to f/161.2 (approx. f/175) with 1° spot viewfinder
Meter Features:
Flash / Reflected Light
Ambient / Incident Light
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