Sekonic Speedmaster L-858D is the world's first multi-function, multi-brand wireless triggering light meter. It is the first of its kind capable of measuring flash duration and brief flash bursts like you find from HSS (High Speed Sync) for precision flash control.

Family:

L-858D

Sensor:

SPD

Measuring System:

Exposure Meter
Incident light: Swivel head, lumidisc retractable
Reflected light: Switching, 1 deg. spot

Measuring Range and Modes:

 

Measuring Modes (Ambient Light):

T priority, F priority, TF priority, HD_CINE (T priority), CINE (f/s priority), Lux/FC, Cd/m2/FL

Measuring Modes (Flash light):

Cordless, Cord-in (PC), Radio triggering (with optional transmitters), Multiple cumulative flash, HSS, Flash duration analysis.

Measuring Range at ISO100 (Ambient Incident Light):

EV-5 to EV22.9
0.1 lx to 2,000,000 lx
0.01 fc to 180,000 fc

Measuring Range ISO100 (Ambient Reflected Light):

EV-1 to EV24.4
0.1 cd/m2 to 980,000 cd/m2
0.03 fl to 290,000 fl

Measuring Range (Flash Incident Light):

F0.5 to F161.2(=128.9)

Measuring Range (Flash Reflected Light):

F1.0 to F161.2(=128.9)

ISO Range:

ISO 3 to ISO 13,107,200 + ISO 850

Aperture Range (Ambient Light):

F0.5 to F161.2(=128.9) in 1, 1/2, 1/3 step
(Analog Scale: F1.0 to F90 in 1/3 step)

Aperture Range (Flash Light):

F0.5 to F161.2(=128.9) in 1, 1/2, 1/3 step
(Analog Scale: F1.0 to F90 in 1/3 step)

Shutter Speeds Range (Ambient Light):

30m to 1/64,000s in 1, 1/2, 1/3 step
(Analog scale: 4s to 1/2,000s in 1/3 step)

Shutter Speeds Range (Flash Light):

30m to 1/16,000s in 1, 1/2, 1/3 step

Flash Duration Range (Flash Light):

1/40s to 1/55,500 sec（25ms to 18us) from t0.1. to t0.9 (in 0.1 steps)

Frame Rate Range (Ambient Light):

1 f/s to 1,000 f/s plus other 20 settings (customized from 0.001 f/s to 99,999.999 f/s)

Shutter Angles Range (Ambient Light):

1 deg. to 358 deg. plus other 20 settings (customized from 0.001 deg. to 360 deg.)

EV Range (Ambient Light):

Incident light: EV-73.9 to EV103.8
Reflected light: EV-69.9 to EV105.3

Memory:

Yes (9 times)
both incident and reflected light

Average:

Yes

Contrast/Comparison Function:

Yes (+/-9.9EV in 1/10 step)

Radio System:

Optional Transmitters with RT-3PW - PocketWizard (433MHz), RT-20PW - PocketWizard (344MHz), RT-EL/PX - Elinchrom EL-Skyport/Phottix (2.4GHz), RT-BR - broncolor RFS 2/2.1/2.2 and RT-GX - Godox/Flashpoint (2.4GHz)

Flash vs Ambient Analyzing:

Yes (in 10% step)

Filter Compensation:

Yes (-20EV to +20EV, preset 30 type)

Exposure Compensation:

Yes (-9.9EV to +9.9EV, in 0.1 step)

Calibration Compensation:

Yes (-1.0EV to +1.0EV, in 0.1 step)

Custom Settings:

Yes (17 custom settings 18 custom settings when transmitter sold separately is installed)

Physical:

 

Water Resistance:

Yes

Diopter Adjustment:

Yes (-1 D to 2.5 D)

Tripod Socket:

Yes

Operating Temperature:

-10 deg. C to 50 deg. C

Storage Temperature:

-20 deg. C to 60 deg. C

Power Source:

1.5V x 2 (AAA battery)

LCD:

2.7" color dot matrix touch panel LCD

Product Weight (lb):

0.53

Product Weight (kg):

0.24

Product Height (in):

1.93

Product Length (in):

6.93

Product Width (in):

3.7

Product Height (cm):

4.9

Product Length (cm):

17.6

Product Width (cm):

9.4

*1: "Under" is displayed when the illuminance is less than 5 lx (0.46 fc) or the Tcp is less than 1,600 K, and "Over" is displayed when the illuminance is over 10,000 lx (929 fc) or the Tcp is over 40,000 K.

*2: Tcp is Température de Couleur Proximale (Correlated Color Temperature).