Sekonic Speedmaster L-858D Light Meter
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Sekonic L-858D Speedmaster Light Meter Black

Sekonic Speedmaster L-858D Light Meter
Item Code: 46440
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  • Description
  • Specifications
  • Package Include
  • Warranty
The Sekonic SpeedMaster L-858D combines over 60 years of Sekonic innovation with cutting-edge, flash-measurement technology to meet the needs of today’s photographers as well as motion image makers. Incorporating flash duration measurement, the first time in a multi-function light meter, the L-858D provides the critical flash data needed to calculate proper ambient-flash exposure. As its name implies, the SpeedMasterL-858D also measures the brief flash bursts of HSS (High Speed Sync) for precision flash exposure control.

The L-858D includes the essence of the popular L-478D series features and functions that enables photographers to break through the boundaries of ISO sensitivity, flash and ambient shutter speeds, as well as frame rates (f/s) and shutter angles for cinematographers.

Increased sensitivity for both incident and reflected-spot sensors in ambient light allows extreme low light level measurements. In addition, the L-858D offers an optional wireless triggering modules now available for Elinchrom, Phottix in addition to PocketWizard brand radio triggering devices. With its 2.7” colour touch screen and truly innovative advanced and sophisticated features, the L-858D breaks away towards the next generation of light measurement control

Flash Duration Measurements
Understanding flash duration is the first step in freezing fast-moving subjects. Since all cameras are limited to relatively low sync speeds, stopping motion in a single image is often achieved by leveraging short flash durations with the camera’s max sync speed. A long-held secret of some of the world’s most talented photographers, the key to freezing action consistently is found in being able to measure flash duration. Photographers are now able to do this easily for the first time, demystifying one of photography’s most challenging techniques.

Radio Control Modules for Wireless Triggering
Having pioneered wireless exposure measurement, the L-858 Speedmaster Pro expands upon this ground-breaking innovation by adding functionality for Elinchrom Skyport and Phottix Strato II/ Ares II users allowing more photographers to experience the benefits of wireless freedom.
With the PocketWizard module photographers can easily trigger any PocketWizard wirelessly and control the power of their lights with any Control TL Compatible Unit.
With the Combined Elinchrom & Phottix Module, photographers have full Skyport triggering and power-control capabilities, while Phottix users have Strato II and Ares II triggering capabilities.

Increased Light Sensitivity
Increased ISO capabilities in today’s cameras have created a need for light meters to increase their ability to measure light in the dimmest of settings. With an

Type Digital light meter for flash and ambient light
Radio Frequency None
Receptor Element Silicon photo diodes
Receptor Head Incident Light: Lumisphere convertible to flat diffuser, rotates 90° right & 180° left
Reflected Light: 1° spot viewfinder
Measuring Modes Ambient Light
F priority (aperture)
T priority (shutter speed)
TF priority (shutter speed and aperture)
HD Cine (shutter priority, FPS metering, lux, or fc)
Cine (FPS metering, shutter angle setting, lux, or fc)
Illuminance (lux or fc)
Luminance (cd/m² or fl)
Flash Light
Cord (PC sync terminal)
Radio triggering (optional)
HSS Flash (cordless)
Flash Duration Analysis (cord, cordless, or radio)
Measuring Range Ambient Light (ISO 100)
Incident: -5 to 22.9 EV
Reflected: -1 to 24.4 EV
Flash Light (ISO 100)
Incident: f/0.5 to f/128.9
Reflected: f/1.0 to f/128.9
0.01 to 180,000 fc / 0.1 to 2,000,000 lux
0.03 to 290,000 fl / 0.1 to 980,000 cd/m²
Repeat Accuracy 0.1 EV or less (Incident light: from EV-2, Reflected light: from EV1)
0.2 EV or less (Incident light: under EV-2, Reflected light: under EV1)
ISO Range 3 to 13,107,200 in 1/3 steps, 850
Shutter Speed Ambient Light: 1/64,000 sec to 30 min, 1/200, & 1/400 sec, in 1, 1/2, and 1/3 steps
Flash Light: 1/16,000 sec to 30 min, 1/75, 1/80, 1/90, 1/100, 1/200, & 1/400 sec, in 1, 1/2, and 1/3 steps
Flash Duration 1/40 to 1/55,500 sec (25 ms to 18 us)
t0.1 to t0.9
Aperture f/0.5 to f/128.9 (in 1 step)
f/0.5 to f/152.4 (in 1/2 steps)
f/0.5 to f/161.2 (in 1/3 steps)
Frame Rate 1-1,000 fps, and 20 user settings from 0.001-99,999.999 fps
Shutter Angle 1-358°, and 20 user settings from 0.001-360°
EV Range Incident Light: -73.9 to 103.8 EV
Reflected Light: -69.9 to 105.3 EV
Memory Function 9 readings
Connections 1 x PC sync terminal
1 x Micro-USB port
Screen 2.7" / 6.9 cm color touchscreen LCD
Power Source 2 x AA batteries (alkaline or manganese)
Tripod Mount Yes, 1/4"-20
Operating Conditions Temperature: 14 to 122°F / -10 to 50°C
Humidity: 0 to 85%
Storage Conditions Temperature: -4 to 140°F / -20 to 60°C
Humidity: 0 to 85%
Dimensions 3.7 x 6.9 x 1.9" / 94 x 176 x 49 mm
Weight 8.5 oz / 240 g without batteries
Packaging Info
Package Weight 1.45 lb
Box Dimensions (LxWxH) 10.2 x 6.5 x 3.7"
  • 1x Sekonic L-858D Light Meter
  • 1x Start-up Guide
  • 1x Strap Lens Cap (Installed on the meter)
  • 1x Soft Case
  • 1x Anti-glare sheet for LCD Screen
  • 1x Safety precaution guide
1 Year UK Warranty
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Gergana Enterprises Limited

20 Gialtas, Agios Nikolaos, PC3100, Limassol, Cyprus