Sekonic L-358 FLASH MASTER Light Meter


Key Features

All-weather digital ambient and flash light meter

A simultaneous reading of flash and ambient light is analyzed. The readings are displayed in three different ways on the LCD:
• 1.Combined readings of flash and ambient
• 2.Percentage of flash in the total exposure
• 3.Simultaneous display of flash, ambient and combined readings on the analog display

Retractable, Removable and Rotating Lumisphere

Optional radio transmitter connects with PocketWizard flash slaves

9 memory banks are available in both Aperture Priority and Shutter Priority Modes, making contrast evaluation and averaging possible in both modes.

Both shutter speeds and apertures can be displayed in full, 1/2 or 1/3 step increments to accommodate most camera manufacturer s settings.

Dual ISO settings possible

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Product Overview

The Sekonic L-358 FLASH MASTER is an advanced, yet easy to operate, exposure analyzing light meter, that incorporates the latest technology in handheld meters. The L-358 features a retractable incident Lumisphere for standard or cosine corrected light readings, provides both hemispherical and narrow angle readings. Measurements can be taken in either incident or flash metering modes with accurate and convenient flash and ambient analyzing. In all electronic flash measurements, an analyzing feature simultaneously evaluates both flash and ambient light and displays the values in three ways: a) combined readings of flash and ambient, b) percentage of flash in the total exposure or c) simultaneous display of flash, ambient and combined readings on the analog scale. An easy-to-read illuminated LCD panel directly displays full, 1/2 or 1/3-stop shutter speeds or apertures and exposure/calibration compensation. Selecting settings is quick and easy with the built-in Jog wheel and cine shutter speeds up to 360 frames per second makes the L-358 a versatile tool in the most demanding lighting scenario. Optional spot finders extend the versatility of the meter with a choice of 1, 5 or 10 degree measuring angles with a viewable parallax-free viewfinder.

International Catalog 
International Catalog Info 

International Catalog Number
JC11 (European Manual)
JC12 (English Manual)
JC1G (Chinese Manual)

Measuring System 
Incident: retractable lumisphere, Reflected: with included reflected Lumigrid (light attachment) or NPFinder 1, 5, or 10 deg. (Optional) 

Measuring Modes Ambient Light 

T priority, F priority, EV, f/s priority

Measuring Modes Flash 

Cordless, Cord-in (PC), Radio triggering (Optional, PocketWizard), Multiple cumulative flash

Measuring Range (ISO 100) Ambient Incident Light 

-2 to 22.9

Measuring Range (ISO 100) Ambient Reflected Light 

1 to 24.4(54 degrees)

Measuring Range Flash Incident Light 

F1.0 to F90.9 (=F124)

Measuring Range Flash Reflected Light 

F1.0 to F90.9

ISO Range 
ISO 3 to 8,000
Aperture Range (Ambient Light) 
F1.0 to 90
Aperture Range (Flash Light) 
F1.0 to 90
Shutter Speeds Range (Ambient Light) 
30 min. to 1/8000 sec.
Shutter Speeds Range (Flash Light) 
30 min. to 1/1000 sec.
Frame Rate Range (Ambient Light) 
EV Range (Ambient Light) 
EV-9.9 to 40.1
Yes (9 times)
Contrast/Comparison Function 
Radio System 
Optional Transmitters with RT-CTL - PocketWizard
Flash vs Ambient Analyzing 
Yes (in 10% step)
Exposure Compensation 
Yes(-9.9 to +9.9)
Calibration Compensation 
Yes(-1.0 to +1.0)
Custom Settings 
Yes (DIP switch)

Water Resistance 
Operating Temperature 
-10 to 50 deg. C
Storage Temperature 
-20 to 60 deg. C
Power source 
3.0V x 1(CR123A battery)
B&W, Segment type
LCD Backlight 
Weight (lbs.) 
Weight (KG) 
Product Depth Inches 
Product Width Inches 
Product Height Inches 
Product Depth Centimeters 
Product Width Centimeters 
Product Height Centimeters 
Product Metric Weight Grams 

Operating Manual, soft case, strap

Synchro terminal cap, Lumigrid


Operating Manual


Startup Guide