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Sekonic L-308X-U Flashmate Light Meter

BH #SEL308XU • MFR #401-305
Sekonic L-308X-U Flashmate Light Meter
Key Features
  • Incident Metering for Ambient & Flash
  • 40° Reflected Light Metering
  • Photo, Cine, and HD Cine Metering Modes
  • Customizable LCD with Auto Backlight
Exceptionally portable and versatile in its design, the L-308X-U Flashmate Light Meter from Sekonic is a versatile meter that blends both photo and video-oriented functions into a single unit. Equipped with a sliding lumisphere, the L-308X is capable of measuring incident or reflected light via a lens with a 40° reception angle. It offers a wide metering range from 0 to 19.9 EV at ISO 100, working with exposure times as low as 1/8000 all the way up to 60 seconds; it also has an equally broad flash range from f/1.0 to f/90.9 at ISO 100.
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Sekonic L308X-U Overview

Exceptionally portable and versatile in its design, the L-308X-U Flashmate Light Meter from Sekonic is a versatile meter that blends both photo and video-oriented functions into a single unit. Equipped with a sliding lumisphere, the L-308X is capable of measuring incident or reflected light via a lens with a 40° reception angle. It offers a wide metering range from 0 to 19.9 EV at ISO 100, working with exposure times as low as 1/8000 all the way up to 60 seconds; it also has an equally broad flash range from f/1.0 to f/90.9 at ISO 100.

The L-308X offers three specialized metering modes: a Photo mode for still shooting with aperture and shutter priority, a Cine mode for selecting frame rates between 8-128 fps with one-tenth of a stop accuracy, and an HD Cine mode for those shooting video with DSLR or mirrorless cameras. All these settings can be easily viewed on the backlit LCD display, which can be customized to your liking and automatically lights up when working at 5 EV or darker. Other features include a PC sync terminal and a cordless flash measuring option. The L-308X-U weighs approximately 3.5 oz and runs on a single AA battery, sold separately.

  • Portable meter for measuring incident and reflected light, features a sliding lumisphere with a 40° reception angle
  • Measuring range of 0 to 19.9 EV at ISO 100
  • Flash measuring range of f/1.0 to f/90.9 at ISO 100; flash can be measured with PC sync terminal connection or cordlessly
  • Remarkably accurate with a rated variance of ±0.1 EV on repeat exposures
  • Exposure times ranging from 1/8000 to 60 seconds
  • ISO 850 available, useful as it matches the native ISO of some video cameras
  • Backlit LCD screen can be customized to display relevant information, automatically lights up under 5 EV
  • Shutter and aperture priority modes available in Photo mode
  • Cine mode allows you to select the frame rate, from 8 to 128 fps, as well as shutter angle with one-tenth stop accuracy
  • Runs on one AA battery, not included

Sekonic L308X-USpecs

Key Specs
Meter Type
Ambient, Flash
Flash Metering
Corded, Cordless
Light Reading Method
Incident, Reflected
Measuring Modes
Aperture Priority, EV Metering, Frame Rate Priority, Shutter Priority
Max Flash Sync Speed
1/500
Cine Speed / Shutter Angle
8 to 128 fps at 45 to 360°
Diffuser
Spherical
Flat
Display
Grayscale Segment LCD
System Connection
PC Sync Terminal
Battery
1x AA
Flash Metering
Corded, Cordless
Metering
Light Reading Method
Incident, Reflected
Measuring Modes
Aperture Priority, EV Metering, Frame Rate Priority, Shutter Priority
ISO Range
3 to 8000 (1/3-Step Increments), Plus 850
Shutter Speed Range
1/8000 to 60 Seconds
Max Flash Sync Speed
1/500
Cine Speed / Shutter Angle
8 to 128 fps at 45 to 360°
Measuring Range
Ambient: 0 to 19.9 EV at ISO 100
Flash: f/1 to 90.9 at ISO 100
Physical
Diffuser
Spherical
Flat
Display
Grayscale Segment LCD
System Connection
PC Sync Terminal
Media Card Reader
No
Tripod Mounting Thread
No
Environmental
Operating Temperature
32 to 104°F / 0 to 40°C
Storage Temperature
-4 to 140°F / -20 to 60°C
General
Battery
1x AA
Dimensions
2.5 x 4.3 x 0.9" / 6.4 x 10.9 x 2.3 cm
Weight
3.5 oz / 99.8 g
Packaging Info
Package Weight
0.45 lb
Box Dimensions (LxWxH)
6.2 x 4.4 x 1.95"

Sekonic L308X-U Reviews

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Does this light meter help to determine which f/ ...

Does this light meter help to determine which f/ stop to use when using 2 lights?
Asked by: Jeffrey
Yes.
Answered by: Rob
Date published: 2021-01-14

What this meter be good for someone trying to ...

What this meter be good for someone trying to stop using auto mode and learn manual mode on their camera?
Asked by: Anthony
This meter would tell you the correct settings to enter into your camera to get the right exposure.c So, yes. Instead of putting your camera on auto and let the camera choose the settings, you would, with the help of the meter, choose the correct settings. Not as fast as point and shoot. But, more accurate than point and shoot.
Answered by: Anonymous
Date published: 2020-12-15

Can this light meter be used with three lights or ...

Can this light meter be used with three lights or more?
Asked by: Michael
You can measure each light individually and then adjust the output to coincide with your desired lighting ratio.
Answered by: Rob
Date published: 2020-12-18

Can you set the aperture of your camera and have ...

Can you set the aperture of your camera and have it give you the shutter speed? With my old meter I can only set shutter and not f stop.
Asked by: Stacey
Yes you can set the aperture
Answered by: vilson
Date published: 2022-08-03

I AM LOOKING AT THE OWNERS MANUAL AND NOWHERE ...

I AM LOOKING AT THE OWNERS MANUAL AND NOWHERE DOES IT SAY IT CAN BE USED WHEN SHOOTING IN MANUAL MODE...…. CAN I USE IT IN Manual mode?
Asked by: Elizabeth
Yes you can , the light meter is made to give you the reading for manual use
Answered by: vilson
Date published: 2022-08-03

Can this unit trigger (and meter) a Godox flash ...

Can this unit trigger (and meter) a Godox flash via a PC to 3.5mm adapter cable? If so, is there any advantage to this over using the 'meter flash' mode on the meter without connecting to flash via sync cable? Thank you.
Asked by: Paolo
If your Godox flash has a 3.5mm (1/8") miniphone sync terminal, then yes, you may use a PC-to-miniphone sync cable to connect the flash to the light meter, and pressing the <TEST> button on the meter will trigger the flash and measure its output. Do note that the flash must be in Manual mode and you must set the flash output manually, as it will not measure TTL automatic flash output. If measured from the same distance, you should get the same/similar reading to using the Cordless Flash Mode.
Answered by: Manzell L
Date published: 2020-06-21

The L-308S jumps from shutter speed 1/125 to ...

The L-308S jumps from shutter speed 1/125 to 1/250. Does this model include more options, such as 1/160?
Asked by: Jurgen
Change the f stop setting to 1/3 increments
Answered by: Anonymous
Date published: 2023-03-04

I'm trying to take simplified illuminance ...

I'm trying to take simplified illuminance reading, followed the steps in the guide, using lumidisk but nothing happens in all custom modes. Seknoic helpdesk solution is restart! any help?
Asked by: FAHAD
If you have followed the directions listed inside the instruction manual, but the light meter is not responding correctly, then there may be a defect with the light meter and/or it may require warranty inspection/repair. If the light meter was purchased within the last 30 days, you may contact our Customer Service Department to inquire about returning the light meter for an exchange or a refund. If it has been over 30 days since you purchased the light meter, you would have to contact Sekonic directly. As Sekonic has recently been having issues with their website, if you are having issues with contacting Sekonic online, you may contact them directly by calling them at 914-347-3300, or you may e-mail them at [email protected].
Answered by: Manzell L
Date published: 2021-01-02
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