Spot & Incident Light Readings Under Flash and/or Ambient Lighting Conditions Calibrated to match the Sensitivity of Your Camera’s Imaging Sensor

The Sekonic L-758DR DigitalMaster is simply the most dynamic light meter you will ever own. It can record incident or 1-degree spot-readings under ambient and/or strobe lighting down to a tenth-stop in accuracy, and it’s sealed against the nastiest of weather. With the included Sekonic RT-32 Radio Transmitter Module and you can wirelessly trigger PocketWizard-enabled flash systems within a 100’ range. But that’s not what makes the Sekonic L-758DR DigitalMaster different from any other meter you have owned. What moves the L-758DR DigitalMaster to the head of the class is that it is the only meter that can be calibrated to read light the way the sensor in your particular camerareads light.

Like film, imaging sensors vary in light sensitivity levels from one batch to the next. Despite manufacturers best efforts, fluctuations of native ISO sensitivities of up to plus/minus half-a-stop can be detected across the uncut wafers as they come off the manufacturing line. Depending on which ‘slice of the pie’ is inside your camera, the specs listed in the camera manual may not hold true to the characteristics of the sensor in your particular camera.

By running an easy calibration test using Sekonic’s L-758DR, a Sekonic Exposure Profile Target (optional) and the included Data Transfer Software (Mac & Windows), you can accurately profile the sensitivity characteristics of your camera’s sensor to determine the compensation value for its true native ISO, dynamic range and clipping points.

After calculating the test data and establishing new exposure parameters, this data is uploaded from your computer via the included USB cable back to the meter where it is stored as camera profiles. Profiling data from up to 3 cameras can be stored in your meter for instant recall.

Type:

Digital exposure meter for ambient and flash light

Light receiving method:

Incident light and reflected light

Incident light:

Convertible to flat diffuser (Lumisphere in down position)

Reflected light:

1° spot with display in finder

Reflected metering distance:

~ 3.3’ to infinity (~1m to infinity)

Light receptor element:

2-Silicon photo diodes (incident and reflected)

Radio technology:

Complex 16/24 bit digitally coded

Range:

Up to 100 feet from transmitter to receiver or transceiver

Channels:

1 to 16 channels standard, 17 to 32 "Selective Quad Triggering"

Radio wave frequency

USA & Canada (FCC & IC)

CH1-CH16 344.00MHz
CH17-CH32 346.50 ~ 354.00MHz

Europe (EU)

CH1-CH16 433.62MHz
CH17-CH32 434.22MHz

Ambient light:

Incident light: EV-2 to EV 22.9

Reflected light: EV 1 to EV 24.4 with 1° spot viewfinder

Flash:

Incident light: f/0.5 to f/161.2 (approx. f/175)

Reflected light: f/2.0 to f/161.2 (approx. f/175) with 1° spot viewfinder

Repeat Accuracy:

+/- 0.1 EV or less

Shutter Speeds:

Ambient light: 30 minutes to 1/8000 seconds (in 1, 1/2 or 1/3 stop) plus 1/200, 1/400 Cine speeds: 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 frames per second (at a 180° shutter angle) 

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

Aperture:

f/0.5 to f/161.2 (in 1, 1/2 or 1/3 stop)

EV:

EV -9.9 to EV 46.6 (in 1/10 stop)

Analog scale:

Aperture: f/1.0 to f/128 (in 1/2 stop)

Shutter speed: 4 seconds to 1/4000 second (in 1/2 stop)

Filter compensation:

+/- 5.0 EV (in 1/10 stop)

All-weather feature:

JIS standard water resistance class 4, splash-proof type

Memory function:

9 readings on analog scale (f/stop and shutter speed) with memory recall and clear feature

Multiple Flash function:

Unlimited flash readings (only one digit is displayed when the cumulative number is ten or more)

Average function:

Up to 9 readings can be averaged

Brightness Difference function:

+/- 9.9 EV (in 1/10 stop)

Flash analyzing function:

0 to 100% in 10% increments

Exposure Out of Range:

U (underexposure) or O (overexposure) indication

Exposure compensation:

+/- 9.9 EV (in 1/10 stop)

Calibration compensation:

+/- 1.0 EV (in 1/10 stop)

Battery Power Indicator display:

With 3 level status icon

Auto Power Off:

20 minutes after last use (10, 5 or no shut off in custom setting mode)

Auto illumination:

EV 6 and under (custom setting function)

1/4" Tripod socket:

For placing meter in subject area for cordless flash measuring

Second ISO film speed setting:

ISO 3 to 8000 (in 1/3 stop)

Diopter adjustment:

-2.5 to 1.0d

Battery:

One CR123A battery (3V Lithium dry cell); 60 hours

Operating temperature range:

14° to 122° F (-10° to 50° C)

Storage temperature range:

-4° to 140° F (-20° to 60° C)

Dimensions:

3.5"W x 6.7"H x 1.9"D (90mmW x 170mmH x 48mmD)

Weight:

9.5oz (268gm) with battery

Standard accessories supplied:

Soft case, strap, lens cap, synchro terminal cap, CR123A Lithium battery, Custom Settings Chart (sticker), Multi-Function Chart (sticker), USB cable, Data Transfer Softer