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Sekonic L-358 Flash Master Light Meter

4.7 out of 5 stars 134 customer reviews
| 20 answered questions

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  • Hi-Res 800 x 600 SVGA LED Backlit Screen 4:3 ratio, Auto Rotate Sensor, Remote Control
  • Sekonic RT-32 Radio Transmitter Module installs easily, enabling wireless
  • Dust-proof and splash-proof (JIS Standard Water Resistance Class 4)
  • Incident readings of three-dimensional subjects are taken using the Lumisphere fully extended
  • Up to 9 readings can be stored in memory for meter averaging and contrast evaluations in Aperture and Shutter priority modes
  • Exposures accurate down to a tenth-of-a-stop for both ambient and electronic flash light readings
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Technical Details

Product Description

Product Description

Since its introduction, Sekonic's L-358 Flash Master has become the best-selling digital flash meter in its class. Weather-sealed against the nastiest of working conditions, the L-358 delivers dead-nuts accurate flash and ambient light reading in both incident and reflected modes.For mixed lighting scenarios, the L-358 displays the combined exposure values of both flash and ambient light sources, including the percentage of flash in total exposure in 10-percent increments. Dual ISO buttons allow for quick exposure factoring when working with two differing film speeds, film and Polaroids, or other situations where comparison readings are desired.

From the Manufacturer

 L-358 FlashMaster

The Sekonic L-358 displays an f-stop range of f/1.0 to f/90.9, and a shutter speed range of 30-minutes to 1/8000th-of-a-second (1/1000th in Flash mode), both of which can be displayed in full-, half-, and third-stop intervals to mirror your camera's exposure display. When set to "full," the exposure is displayed in tenth-of-a-stop increments with repeat accuracy of +/- 0.1 EV.

For motion picture applications, the L-358 calculates cine readings from 2 to 360 frames-per-second. As with all Sekonic meters, the Sekonic L-358 Flash Master includes a 3-year warranty and the best customer support you're ever likely to find.

The simple solution to creative light control with optional wireless triggering

Directional light is powerful. It guides the viewer, creates mood, and adds dimension, depth, and texture. If you want to create a signature style that elevates your photography to the next level, the mastery of off-camera lighting should be your next goal.

Subjects – clients – are not impressed with a shoot, view, and adjust photo style. Lighting ratios, ambient balance, and final exposure must be set confidently. Knowledge and use of the tools of photography assure that the outcome is the intended one. And for images like this one, the Sekonic L-358is the professional photographer’s meter of choice.

Incident Light Metering

Unlike in-camera metering, handheld, incident light meters don’t require multi-patterned readings, complex exposure control systems, or +/- exposure correction when they fail. They are, in fact, the simplest and most direct way to determine exposure. And because incident meters measure the light that falls on your subject, they provide camera settings that render the image exactly the way it appears. Blacks are black. Grays are gray. Whites are white.

Retracting the Sekonic L-358’s Lumisphere enables you to quickly judge the brightness of multiple light sources for fast, accurate adjustment of lighting ratios.

Ambient Light Metering

Take shutter-priority or aperture-priority readings from 30 minutes up to1/8000 second and f/1 to f/90.9 with ¹/10-stop accuracy. The L-358 displays exposure both digitally and on an analog scale for easy readout. Custom functions enable adjusting the shutter speed and aperture readout for full-, half-, and third-stop increments to mirror the setting of your camera. You can change exposure settings after reading and the meter will automatically compensate to maintain the proper exposure. And the extended sensitivity range, EV -2 to 22.9 for ISO 100, allows taking exposure measurements in virtually any kind of light.

Flash Light Metering

Shutter-priority readings of flash light can be made with a synch cord or cordlessly at shutter speeds from 30 minutes to 1/1000 second.The L-358 automatically resets after each reading in cordless mode to enable fast adjustment of flash brightness. The multi-flash function enables accumulating an unlimited amount of flash pops for times when a single flash pop cannot achieve the proper exposure or the amount of depth of field needed for the subject.

Optional Radio Flash Triggering

Simply plug the optional Sekonic RT-32 Transmitter Module into the battery compartment and wirelessly trigger flash units up to 100 feet away. The transmitter offers 32 digital coded channels and Quad-Triggering Zones and is compatible with PocketWizard® radio triggering systems, as well as the PocketWizard Wireless Freedom partners.

                                               Analyzing Function

The L-358 is especially useful for on-location shooting to lighten shadows or reduce background detail. That’s because it measures ambient and flash simultaneously and automatically indicates the percentage of flash in the total exposure. You can easily adjust the ambient flash mix by turning the Jog Wheel. The digital display indicates the camera settings and an analog display shows the relationship between ambient and flash and the total exposure.

Sekonic L-358 Functions

All controls are at your finger tips. Familiar Jog Wheel operation and large LCD readout make settings fast and easy.

Contrast Function

Setting up lighting ratios or checking the evenness of a background or scene is push-button simple. Take a reading of the key or reference light and press the AVE/?EV button to create a standard. Then press the measuring button to display the brightness difference between the standard and new reading.

Additional Features:

Reflected light metering: Included Lumigrid or optional 1, 5, and 10-degree viewfinder spot attachments
Swivel head
9-reading memory plus averaging
Illuminated Data panel
Dust-proof and splash-proof (JIS Standard Water Resistance Class 4)
Cine frame rates from from 2 to 360 fps

Technical Specifications:

Type: Digital exposure meter for ambient and flash light
Receptor Head: Rotating Domed Head 90° to the right, 180° to the left, Retractable for Contrast Reading
Light Receiving Method: Incident light and reflected light
Receptor Incident Light: Convertible to flat diffuser (Lumisphere in down position)
Receptor Reflected Light: Light receiving angle 54° (Lumigrid)
Light Receptor Element: 2-Silicon photo diodes (incident and reflected)

Measuring Range and Modes
Measuring Modes Ambient Light: - Aperture priority metering
- EV metering
- Shutter priority metering
Measuring Modes Flash: - Measurement using the optional wireless flash radio triggering system (cumulative and non-cumulative)
- Without synchro cord (cumulative and non-cumulative)
- With synchro cord (cumulative and non-cumulative)
Measuring Range (ISO 100) Ambient Light: - Incident light EV-2 to EV 22.9
- Reflected light EV-2 to EV 22.9 with 54° Lumigrid
Measuring Range (ISO 100) Flash: - Incident Light f/1.0 to f/90.9 (approx. f/124)
- Reflected Light f/1.0 to 90.9 (approx. f/124) with 54° Lumigrid
Repeatability Repeat Accuracy: (+/-) 0.1 EV or less
Calibration Constant Incident: Lumisphere C = 340, Flat Diffuser C = 250
Calibration Constant Reflected: K = 12.5

Display Range and Modes
Display Range Film Speed: ISO 3 to 8000 (in 1/3 steps)
Display Range Shutter Speeds Ambient: 30 min to 1/8000 sec. (in 1, 1/2, 1/3 steps) plus 1/200, 1895/400
Display Range Shutter Speeds Flash: 30 min to 1/1000 sec. (in 1, 1/2, 1/3 steps) plus 1/75, 1/80, 1/90, 1/100, 1/200, 1/400
Display Range Aperture: f/1.0 to f/90.9 (in 1, 1/2, 1/3 steps)
Display Range EV: EV -10.0 to EV 40.0 (in 1/10 steps)
Display Cine Speeds fps: 2, 3, 4, 6, 8, 12, 16, 18, 24, 25, 30, 32, 36, 40, 48, 50, 60, 64, 72, 96, 120, 128, 150, 200, 240, 256, 300, 360 (shutter angle: 180°)
Display Range Analog Scale Aperture: f/1 to f/90 (in 1/2 steps)
Display Range Analog Scale Shutter Speed: 2 sec. to 1/4000 sec. (in 1/2 steps)

Exposure Out Of Range: Eu (underexposure) or Eo (overexposure)
Memory Function: 9 readings
Average Function: Up to 9 readings can be averaged
Brightness Difference Function: (+/-) EV (1/10 stop)
Flash Analyzing Function: 0 to 100% in 10% increments
Multiple Flash Function: Infinite number of flash readings (Only one digit is displayed when the cumulated number is ten or more)
Calibration Compensation: (+/-) 1.0 EV (in 1/10th steps)
Exposure Compensation: (+/-) 9.9 EV in 1/10 steps)
Custom Functions: DIP Switch Mode Selection
All Weather Feature: JIS Standard Water Resistance Class 4, Splash Proof Type
Auto Power Off: Yes, 20 minutes after last use
Battery Power Indicator Display: Icon with 3 status
Second ISO Film Speed Setting: ISO 3 to 8000
Battery(Power): (1) 3V Battery, Model CR123A Lithium
Operating Temperature Range: 14? to 122? F / -10? to 50? C
Storage Temperature Range: -4? to 140? F / -20? to 60? C

Radio Triggering  
Radio Triggering Radio: Complex 16/24 bit digitally coded w/ optional RT-32N Module
Radio Triggering Channels: 1 to 16 channels standard, 17 to 32 "Quad Triggering"
Radio Triggering Range: Up to 100 feet from transmitter to receiver
Radio Wave Frequency Europe: - CH1-CH16 433.62MHz
- CH17-CH32 434.22MHz
Radio Wave Frequency USA Canada: - CH1-CH16 344.00MHz
- CH17-CH32 346.50MHz

Dimension and Weight
Product Dimensions: 6.10x2.30x1.50 in./6.00x15.00x4.00 cm
Product Weight: 0.40lbs./0.20kg.

Item Includes:
L-358 Case, CR123A Battery, Strap, Synchro Terminal Cap and Lumigrid

Product Information

Product Dimensions 1.9 x 3.5 x 6.7 inches
Item Weight 9.4 ounces
Shipping Weight 8.5 ounces
ASIN B00007E89K
Item model number 401-358
Batteries 1 Lithium Metal batteries required.
Customer Reviews
4.7 out of 5 stars 134 customer reviews

4.7 out of 5 stars
Best Sellers Rank #28 in Camera & Photo > Camera & Photo Accessories > Lighting & Studio > Light Meters & Accessories > Light Meters
Date first available at October 2, 2001

Technical Specification

Warranty & Support

Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

This Sekonic L-358 light meter is an excellent meter. I have fallen in love with it. Lots of Today's 35mm SLR camera meters are TTL Meters (reflected light measurement meters). Sekonic L-358 is such a high precision instrument which measures incident, reflected, flash (cord & cordless). I got great digital photos after I have used the reading on 2 different cameras under normal & Flash lights.

The pictures are great out of your camera and do not require any editing if used properly according to the instructions. I like the built in Memory function to store readings, Shutter Priority, Aperture Priority, 2 ISO functions, Weather proof Seal, Can include optional radio transmitter + receiver modules to wirelessly trigger flash units, So far Battery Life has been Good. This meter does not use "AA" it uses CR-123A so you will have to always carry one spare with you.
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I read a light meter review recently where the reviewer said; "even if you don't think you need a light meter, you do." This is good advice.

Three huge advantages come to mind after using this meter once.

First, it is a tremendous time saver during the shoot and afterwards in post processing, take a light reading, set your camera to what the meter reads and shoot.

Second, repeatability - even if you are shooting low/high key or going for artistic effects; you can reproduce lighting ratios/scenarios you like easily in the future. When you don't have a light meter you can spend countless hours tweaking the power settings on your strobes or multiple shoe mount flash units to get a few shots right.......and when you're done and have packed it all up......the next day, week, have no way to get back to those settings again.

Third, better pictures.

Having an LCD/preview and histograms are useful but DSLRs, even the most advanced cameras in the world, can not do what a light meter can. In camera metering has no way of measuring or calculating the light output from studio strobes. TTL, iTTL & all these intelligent flash systems (for shoe mount flash units) still have a place when you are shooting events and there is no time to take light readings. But after using this light meter I can honestly say that if there is time and the shots are important I will never rely on iTTL systems ever again. iTTL flash results are all over the place, when you meter the light and shoot in manual the results will be 100% predictable 100% of the time. My speedlights are going to live in manual mode when there is time to use a light meter from now on.

I doubt you can beat the Sekonic L-358 at this price point. I've only had this meter a few hours but like so many others have said, I wish I had purchased this a long time ago. This is a 5 star product, it works great and is reasonably priced.
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I purchased this light meter when I got a chance to use a film medium format camera for awhile. It has every feature that I could like and was so good at exposure measurements that I started using it on my Canon 30D digital when the time for the shot permitted.

At first when I purchased it I thought it was so 'old school' to have a lightmeter, but I knew I was going to have it to use the medium format film camera I had and I wanted to go with strobes eventually so I was going to need it as well for the best results. I was quite surprised to find out how much of a difference it makes on digital and it pointed out how even a good digital camera can only do so good of an exposure prediction because of color and reflection assumptions it has to make.

If you've got to get exposure right on, then get a good light meter. The L-358 is a great light meter for the money.
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Using primarily as a studio flash meter and for church formals.

Unit meters as expected for a $240 unit, so no applause for that.

I like:
- The retractable lumpishere (from dome, to flat). VERY useful.
- Ability to show ambient/flash as a percentage. Useful.

That the unit requires two hands to operate. For every operation, you
need to hold down one of the functions buttons then scroll the wheel
to change the value. This really stinks, since I'm usually holding
something else in my other hand. Another 'dip' switch, as Sekonic
calls them, should be added that allows the unit to be operated with
one-hand (ie., automatically 'holds' certain function button while you
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I purchased this item from a well known camera company based out of New York. I hear many people say they are happy with the built in camera exposure metering... or that they use their digital display screens on the camera to review a picture and make adjustments... using those "reasons" to justify why they don't go spending hundreds of dollars on a light meter such as this. Frankly, the price is a little painful. I'll give you that. But... the camera's built in metering won't meter flash, and the review screens are tiny and not always as trusty as you would think they should be! Recommendation and solution? Get a light meter. Better yet... get this light meter. Here's a couple of lists!

What's hot:
* Learning curve seems daunting when you pick it up, but is surprisingly easy to grasp within minutes.
* Weather sealed. (Us it when the weather is less than ideal... it's okay!)
* Excellent price for the what you get.
* Flash metering, EV readings (Exposure value), and ambient light readings. (useful inside, outside, flash, % flash fill, and more)
* Comes with a lumisphere AND lumigrid.
* Comes with a carrying case and cord that can be used while in the case, or not.
* Back-lit LCD is easy to read in the dark and turns on when it automatically detects the light level being low.
* Has optional accessories to add later, including Spot attachments, a "mini" lumisphere (12mm), and a wireless transmitter for pocket-wizard integration.

What's not:
* Battery is not "standard" (IE: AA, AAA, etc). You'll have to hunt one down if it runs out. (I've heard they're easy to find, however, but I've not had to look for one yet personally)
* Pocket wizard accessory isn't standard.
* Great value, but $300ish bucks is still spendy to me.
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