Sekonic Speedmaster L858D-U Light Meter

Sekonic Speedmaster L858D-U Light Meter
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  • Brand: Sekonic
  • Product Code: Sekonic Speedmaster L858D-U Light Meter
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Aiming to provide for the needs of both photographers and filmmakers, the Speedmaster L-858D-U Light Meter from Sekonic comes packed with a variety of upgraded features and capabilities that make it an almost essential tool for a working professional. It is able to take incident and reflected light readings of both flash and ambient light with an expanded measuring range of -5 to 22.9 EV at ISO 100, or within an illuminance range of 0.1 to 2,000,000 lux. Users will also find it intuitive and easy-to-use thanks to the use of a 2.7" color touchscreen LCD and an all-weather design.

The meter can use either a 270° rotating and collapsible lumisphere or an integrated 1° spot viewfinder to account for varying needs of the user. Also, it offers an extensive range of cinema and video settings as well as the unique ability to measure flash duration and to take readings when using high-speed sync flash. The L-858D-U is equipped with a variety of other functions as well, including memory recall, a Flash Analyzing Function, and extended ranges on nearly every setting. Additionally, through the use of optional modules, users can add radio triggering support for PocketWizard and Elinchrom/Phottix systems.

  • Lumisphere receptor head rotates 90° right and 180° left and retracts for conversion to a flat diffuser.
  • Integrated 1° spot viewfinder with full information display provides a precise method of measuring specific parts of a scene.
  • Ability to measure flash duration within a range of 1/40 to 1/55,500 second using t0.1 to t0.9 settings.
  • Improved sensitivity of the L-858D-U allows it to record a reading at just 0.1 lux illuminance as well as use expanded range of -5 to 22.9 EV for incident readings and -1 to 22.4 EV for reflected light. Also, it features an extended ISO range of ISO 3 to ISO 13,107,200 with an option available for ISO 850.
  • Optional radio modules are available for PocketWizard and Elinchrom/Phottix systems for advanced wireless triggering and remote flash control.
  • High-Speed Sync support allows photographers to accurately take readings while using HSS with their flashes and cameras.
  • Flash Analyzing Function measure ambient and flash simultaneously to provide a percentage of flash in the final exposure. Users can then adjust the mix as the display shows camera settings and the relationship between the flash and ambient light in your exposure.
  • Users can determine the dynamic range of their camera using optional targets by taking bracketed shots with their measurement data and they using the Sekonic Data Transfer Software to graph and then save the information to the meter.
  • Expanded shutter speed ranges now allow for readings between 1/64,000 second to 30 minutes with ambient light and 1/16,000 second to 30 minutes for flash.
  • A comprehensive set of cinema modes allows for settings of 1-1000 fps as well as shutter angles of 1-358°. Twenty user determined settings are also available that provide more precise options of 0.001-360° shutter angles and 0.001-99,999.999 fps.
  • 2.7" color touchscreen LCD provides a fast and intuitive method for viewing and changing settings.
  • Micro-USB port can be used for firmware updates, applying custom settings, and to use exposure profiling.
  • The L-858D-U features an all-weather construction that is dust and splash proof (JIS Class 4).

L-858D Speedmaster Light Meter - Technical Specifications


Measuring System

Incident light Swivel head Horizontal (270 degrees)
  Lumidisc Retractable
Reflected ligthg Switching incident/reflected Operation on LCD
  Light receiving angle 1degree(built-in)
  Viewfinder(Optional) No
Flash light Multiple flash mode  Yes
  Cordless/cord-in mode Yes
  Radio triggering mode PocketWizard Yes (optional)
  Radio triggering mode Elinchrom Skyport Yes (optional)
  Radio triggering mode Phottix Yes (optional)
  Flash duration analysis mode Yes
  HSS mode Yes

Measuring Range(ISO100)

Ambient Incident EV -5 to 22.9
  Reflected EV -1 to 24.4
  Option VF 1deg. EV No
  Option VF 5 deg. EV No
  Option VF 10 deg. EV No
  Illuminance LUX 0.1 to 2,000,000 lx
    FC(Foot-Candle) 0.01 to 180,000 fc
  Luminance Cd/m2 0.1 to 980,000 cd/m2
    FL(Foot-Lambert) 0.03 to 290,000 fl
Flash Incident F F0.5 to F161.2(=128.9)
  Reflected F F1.0 to F161.2(=128.9)
  Option VF 1 deg. F No
  Option VF 5 deg. F No
  Option VF 10 deg. F No

Display Range

ISO Sensitivity ISO   3 to 13,107,200
  ISO 2   No
Ambient Aperture Digital F0.5 to 161.2(=128.9)
    Step 1,  1/2,  1/3AV
    Decimal fraction 0 to 0.9(digital)
    Step 1/10AV
    Analog dot scale F1.0 to 90
    Step 1/3 AV
  Shutter speed Digital 30m to 1/64,000s
    Step 1,  1/2,  1/3 TV
    Analog dot scale 4s to 1/2,000s
    Step 1/3 AV
  Frame Rate Digital 1 to 1,000 f/s
  EV Digital -73.9 to 103.8 for incident
-69.9 to 105.3 for reflected
    Analog dot scale -3.0 to +3.0 EV for incident
-7.0 to +7.0 EV for reflected
    Step 1/3 EV
  Lux Digital 0.1 to 2,000,000 lx
    Step 2 significant digits
    Analog dot scale 0 to 1,000 lx
    Step in 50 lx
    Analog dot scale 0 to 5,000 lx
    Step in 250 lx
    Analog dot scale 0 to 25,000 lx
    Step in 2,500 lx
  FC(Foot-candle) Digital 0.01 to 180,000 fc
    Step 2 significant digits
    Analog dot scale 0 to 100 fc
    Step in 5 fc
    Analog dot scale 0 to 500 fc
    Step in 25 fc
    Analog dot scale 0 to 5,000 fc
    Step in 250 fc
  Cd/m2 Digital 0.1 to 980,000 cd/m2
    Step 2 significant digits
    Analog dot scale 0 to 50 cd/m2
    Step in 2.5 cd/m2
    Analog dot scale 0 to 250 cd/m2
    Step in 12.5 cd/m2
    Analog dot scale 0 to 2,500 cd/m2
    Step in 125 cd/m2
  FL(Foot-lambert) Digital 0.03 to 290,000 fl
    Step 2 significant digits
    Analog dot scale 0 to 20 fl
    Step in 1 fl
    Analog dot scale 0 to 100 fl
    Step in 5 fl
    Analog dot scale 0 to 1,000 fl
    Step in 50 fl
Flash Aperture Digital F0.5 to 161.2(=128.9)
    Step 1,  1/2,  1/3AV
    Analog dot scale F0.1 to 90
    Step 1/3 AV
  Shutter speed Digital 30m to 1/16,000s
    Step 1,  1/2,  1/3TV
  EV Digital No
    Analog dot scale -3.0 to +3.0 EV for incident
-7.0 to +7.0 EV for reflected
    Step 1/3 EV
  Flash duration Digital 1/40 to 1/55,500(25ms to 18us)

Setting Range

ISO Sensitivity   ISO 3 to 13,107,200 plus 850
    Step 1/3 SV
    ISO 2 No
    Step No
Ambient Aperture F F0.5 to 161
    Step 1,  1/2,  1/3AV
  Shutter speed T 30m to 1/64,000s
plus 1/200, 1/400s
    Step 1,  1/2,  1/3TV
  Shutter angle degrees 1 to 358 deg. plus other 20 settings (customized from 0.001 to 360)
  Frame Rate frame per second 1, 2, 3, 4, 6, 8, 10, 12, 14, 15, 16, 18, 20, 23.976, 24, 25, 29.97, 30, 32, 36, 40, 47.952, 48, 50, 59.94, 60, 64, 72, 75, 90, 96, 100, 120, 125, 128, 150, 180, 200, 240, 250, 256, 300, 360, 375, 500, 625, 750, 1000 plus other 20 settings (customized from 0.001 to 99,999.999)
Flash Shutter speed T 30m to 1/16,000s
plus 1/75,  1/80,  1/90,  1/100,  1/200,  1/400s
    Step 1,  1/2,  1/3TV
  Flash duration  t value 0.1 to 0.9 (in 0.1 step)


Multiple cumulative Yes(Unlimited)
Average Yes
Shadow No
High light No
Zone System No
Flash Analyzing Yes(in 10% step)
Memory Yes(9 times) both incident and spot
Memory clear Yes (individually)
Contrast Function Yes(+/-9.9EV in 1/10 step)
Film memory (ISO 2) No
Filter compensation Yes(-12 to 12EV)
Filter factor number compensation Yes (preset 24 types plus 6 settings)
External receptor jack No
USB port Yes
Battery check Yes
Auto power off Yes (selectable.)
Under/Over exposure display Yes
Exposure Warning Indicator Yes
Exposure compensation Yes(-9.9 to +9.9)
Calibration compensation Yes(-1.0 to +1.0)
Exposure Profile Yes
Dip switch (L-358/608) No
Custom settings Yes (17 items)
Synchro terminal Yes
LCD backlight Yes
Water registance Yes
Switching incident/reflected Yes (software)
Retractable lumisphere Yes
Setting lock Yes (Touch panel)
How to change setting Touch panel operation
Diopter adjustment Yes (-1 to 2.5 D)
Tripod socket Yes


Operating temperature -10 to 50℃
Storage temperature -20 to 60℃
Power source 1.5V x 2 (AA battery) and USB bus power
Weight 10.58 oz. (300 g)
Dimensions (W x H x D) 3.7 x 6.94 x 1.94 in. (93.9 x 176.3 x 49.4 mm)
LCD 2.4" color dot matrix LCD

Standard Accessory

USB cable No
CD-rom with Software & Manual No (download from website)
Sticker for multi-key &/or CS operation No
Quick Guide / Start Up Guide Yes
Lens Cap Yes
Strap Yes
Synchro terminal cap Yes (built-in)
Soft case Yes
Anti glare film Yes

Optional Accessory supplied

Booster No
Mini light receptor No
Viewfinder No
Lumishphere Yes
Lumidisc Yes (same as Lumisphere)
Lumigrid No
ND diffuser No
Pin point receptor No
Spot mask No
Synchro cord Yes
Radio wave triggering system Yes
Step-up ring Yes
18% Gray card (folded) Yes
Exposure Profile Target / II Yes
Tripod Mount 1/4"-20
Interface-Connector PC Sync Terminal Micro-USB Port
Display Display : 2.7" / 6.9 cm Color Touchscreen LCD Diffuser : Adjustable Spherical to Flat
Dimensions (Diam. x Depth) 3.7 x 6.9 x 1.9" / 94 x 176 x 49 mm
Memory Card Type Memory Card Slots : None Exposure Memory : Yes, 9 Readings
Technical Data
Specification Light Reading Method : Incident Reflected Light Readings : Candelas per Meter Squared (cd/m²)|Foot Lamberts (fl)|Footcandle|Lux Measuring Modes : Aperture Priority|FPS Metering|Flash Duration Analysis|HSS Flash Shutter Priority Aperture Range : Flash, Incident: f/0.5 to 128.9 at ISO 100|Flash, Reflected: f/1 to 128.9 at ISO 100|f/0.5 to 161.2 (1, 1/2, 1/3-Step Increments) at ISO 100 EV Range : Ambient, Incident: -5 to 22.9 EV at ISO 100|Ambient, Reflected: -1 to 24.4 EV at ISO 100 Shutter Speed Range :1/64,000 to 30 Minutes (1, 1/2, 1/3-Step Increments), Plus 1/400, 1/200 Cine Speed / Shutter Angle : 0.001 to 1000 fps at 1 to 358° Illuminance Range :0.1 to 2,000,000 lux / 0.01 to 180,000 fc Luminance Range : 0.3 to 290,000 fL / 0.1 to 980,000 cd/m²
Type Meter Type : Ambient Cine Flash Spot
Exposure Control
Shutter Cine Speed / Shutter Angle : 8 to 128 fps at 45 to 360°
Metering Method Flash Metering : Cordless Spot Metering : 1° Spot
Max Sync Speed 1/16,000
Battery 2 x AA (Alkaline, Manganese)
Operating/Storage Temperature Operating Temperature : 14 to 122°F / -10 to 50°C Operating Humidity : 0 to 85% Storage Temperature : -4 to 140°F / -20 to 60°C Storage Humidity : 0 to 85%
Weight 8.5 oz / 240.0 g (without Batteries)

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Tags: Sekonic Speedmaster L858D-U Light Meter, Sekonic, L858D