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L-308S Flashmate

Cat # 401-309

The pocket-sized Sekonic L-308S FLASHMATE is the smallest and lightest digital light meter in the Sekonic line-up. Designed to read ambient or flash exposures in either reflected or incident modes.

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Items Include:

L-308S Case, Strap, Syncro Terminal Cap and Lumidisc w/ case

The L-308S delivers accurate exposure readings in full, half, or third-stop increments to mirror the exposure displays of most popular cameras. When set to full-stop mode, exposures are displayed in tenth-stop increments with a repeat accuracy of +/- 0.1 EV.

Reflected readings capture at a light receiving angle of about 40-degrees, or slightly wider than the viewing field of a normal lens. For incident readings, a small, built-in Lumisphere slides over the silicon diode sensor. For flat-field incident readings, a Lumidisc (included) snaps over the sensor for metering flat artwork or measuring contrast and/or exposure ratios within a scene. Electronic flash exposures can be taken with or without a PC cord.

Exposure data is displayed on the LCD screen, which has been redesigned to emulate the look and feel of the LCD on the ‘bigger-brother' Sekonic L-358 flash meter. Exposure data and related information is displayed using large type and easy-to-read icons. At ISO 100 ambient light can be read over an EV range of 0 to 19.9 in both incident and reflected mode. Flash exposures are displayed from f/1.4 to f/90.9 (or about f/124). ISO sensitivity is set from 3 to 8000 in third-stop increments. For cinema applications, the L-308S can be programmed to display exposure times from 8 to 128 frames-per-second.

The Sekonic L-308S FLASHMATE comes with a Lumidisc (with pouch), a soft case, strap, synchro terminal cap and a AA battery.



Weight0.2 lbs. (0.1 kg)
Exterior Dimensions2.5W X 0.9H X 4.3D in.
(6.4 X 2.3 X 10.9 cm)
TypeDigital exposure meter for ambient and flash light
Receptor HeadSliding Lumidome with Lumigrid Adapter
Light Receiving MethodIncident light and reflected light
Receptor Incident LightConvertible to flat diffuser (Lumisphere slides to expose Lumidisc)
Receptor Reflected LightLight receiving angle 40° (Lumigrid)
Light Receptor ElementSilicon photo diode
Measuring Modes Ambient LightShutter priority metering, EV metering
Measuring Modes FlashWith synchro cord - Without synchro cord
Measuring Range (ISO 100) Ambient LightIncident light EV 0 to EV 19.9 - Reflected light EV 0 to EV 19.9 (with 40° Lumigrid)
Measuring Range (ISO 100) FlashIncident light f/1.4 to f/90.9 (approx. f/124) - Reflected light f/1.4 to f/90.9 (approx. f/124) with 40° Lumigrid
Repeatability (Repeat Accuracy)(+/-) 0.1 EV or less
Calibration Constant IncidentLumisphere C = 340, Lumidisc C = 250
Calibration Constant ReflectedK = 12.5
Display Range Film SpeedISO 3 to 8000 (in 1/3 stops)
Display Range Shutter Speeds Ambient60 seconds to 1/8000 second (in 1, 1/2, 1/3 stops)
Display Range Shutter Speeds Flash1 second to 1/500 second (in 1, 1/2, 1/3 stops) plus 1/75, 1/80, 1/90, 1/100 sec.
Display Range Aperturef/0.5 to 90.9 (in 1, 1/2, 1/3 stops)
Display Range EVEV -5 to EV 26.2 (in 1/10 stops)
Display Range Cine Speeds fps8, 12, 16, 18, 24, 25, 30, 32, 64, 128 (shutter angle: 180°)
Exposure Out of RangeEu (underexposure) or Eo (overexposure)
Auto Power OffYes, About 4 minutes after last usage
Battery Power Indicator DisplayIcon with 3 status
Battery (Power)Type AA 1.5V Battery (alkaline, manganese or lithium)
Operating Temperature Range32° to 104° F (0° to 40° C)
Storage Temperature Range(-) 4° to 140° F (-20° to 60° C)


Pocket-sized Digital Meter for Incident and Reflected Flash and Ambient Light Readings

  • Smallest digital flash-meter for reflective and incident light readings in ambient or electronic flash lighting conditions
  • Exposures accurate down to a tenth-of-a-stop for both ambient and electronic flash light readings in full-stop mode. Meter can also display shutter-speeds and apertures in half or third-stop increments to mirror the exposure settings on your camera with a repeat accuracy of +/- 0.1 EV
  • At ISO 100, the ambient EV range is 0 to 19.9, flash f/stops range from f/1.4 to f/90.9 with a shutter-speed span of 60-seconds to 1/8000th-of-a-second (1 sec to 1/500th for flash). For cinema applications frame rates can be set from 8 to 128 frames-per-second. ISO sensitivity can be set from 3 to 8000 in third-stop increments
  • Pocket-sized, and easy to stow away. The L-308S measures 2.5"W x 4.3"H x 0.9"D (63mmW x 110mmH x 22mmD), and weighs in at 3.4 ounces (95g).
  • Includes Lumidisc with pouch, soft case, strap, synchro terminal cap, AA battery.
  • Year Warranty, extendable at no charge to 3 years total (USA only) after registration, backed by our outstanding customer support team


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