Which is the best SEKONIC illuminance meter

Spot SEKONIC Illumination Scorer, Chromaticity Scorer, and Photometer

Spot SEKONIC Illumination Scorer, Chromaticity Scorer, and Photometer

Equipped with four color rendering indices and one quantification indexThe new index of SSI installation feeling.

*Sekonic research as of November 2018
The spectrometer C-800 is equipped with four new quantification methodsColor rendering index of sensation:SSITheTLCITheTM-30-18andCRICompatible with various genres of light color evaluations. This is a high-performance colorimeter that supports digital photography and is equipped with a spectral sensor that can accurately measure light sources such as LEDs and fluorescent lamps, which are difficult to use with traditional RGB filter sensor methods. We have achieved more accurate color temperature measurement by matching the sensor light receiving characteristics of digital cameras. It also has the function of displaying the number and index of color temperature conversion filters and color correction filters required for accurate reproduction of the subject's color.

Measurement items and display modes suitable for shooting applications
● Portable devices can be used to display, record, and even draw measurement values
Through the use of cumulative sensors, flash measurement can be performed using spectral methods
● Lack of humanized product design for uncovered dark correction and uncovered dark correction of the light receiving part of the mechanism
Calibration certificate, test report, traceability - lineage chart can be issued (fee charged)

Purpose of use

Measure the color temperature of light sources in general photography such as photography, video, and movies
Filter calibration to match the color temperature between multiple light sources
● Manage individual differences and changes over time in lighting equipment
Environmental light management in the production process of color proof film for printing and digital printing
Use color rendering index to evaluate and confirm the color reproducibility of light sources

recommend customers

Customers engaged in photography related fields such as photography, video and cinematographers, lighting technicians, and cinematographers
Customers of lighting engineers in architecture, art, interior, and other fields, as well as customers in rental studios, lighting management light source shops, etc

Multiple display modes

Home screen

Comprehensive measurement value displayYou can quickly switch display modes by touching the icons on the home screen. In addition to the text mode that displays measurement values in text format, there are also various modes such as spectral mode, spectral comparison mode, color rendering evaluation mode, filter mode (camera/light), and multi light comparison mode. White balance correction mode.

Can display x, y chromaticity coordinates, hue, and saturation in text.Supports text display of CIE1931 x, y chromaticity coordinates, hue, and saturation.
Directly input the measurement results into RGB dimming LED to help match the color tones of multiple light sources. You can easily check the lighting condition and basic data such as color temperature, LB correction value, CC correction value, and illuminance at a glance.

• text mode
  
  
  

• text mode
  
  
  

• Measurement project selection screen
  
  
  

• Color rendering evaluation (CRI) display items
  Select screen
  
  

In text mode, measurement values are displayed in numerical form. You can freely choose or replace the 5 items that can be displayed on the measurement item selection screen.

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  displaySpectral mode spectrometer.It can also display charts in full screen.

• Spectral comparison mode
  
  You can call up to two saved data examples and compare them with the photometric data.

• Color rendering evaluation mode
  
  Ra， Display the color rendering evaluation indicators from R1 to R15 in the form of charts and numerical values. You can select and display the indexes that you are particularly interested in.

• Camera filter mode
  
  Display appropriate camera correction filter names for color deviation and target color temperature.

• Lighting filter mode
  
  Display the name of the lighting correction filter suitable for color deviation and target color temperature.

• Multi lamp comparison mode
  
  Display measurement data for up to 4 lamps on the same screen. Display the data difference between the clicked radio button and the displayed one.

• WB calibration mode
  
  Display the color deviation and color temperature correction values for the target on the WB correction screen installed in the camera.

Equipped with four color rendering indices, it is a new indicator for quantifying sensation.
Equipped with color rendering evaluation modes (CRI (Color Rendering Index), SSI (Spectral Similarity Index), TLCI (Television Illumination Consistency Index), TLMF (Television Illumination Matching Factor), TM-30-18 (Technical Memorandum)).

• SSI mode screen
  
  SSI is a color rendering index developed by the Academy of Motion Picture Arts and Sciences in the United States, which displays a comparison in index form with CIE standard light sources (tungsten filament lamps, daylight D55, etc.) or memory light sources, as well as a chart. C-800 isoneA product equipped with a colorimeter.

• TLCI/TLMF mode screen
  
  TLCI is a color rendering index that takes into account camera characteristics and is designed for creating television images. Similar to CRI, it displays a maximum score of 100. It also has a function called TLMF, which can display comparisons with reference light sources (stored values) using an index.

• TM-30-18 mode screen
  
  TM-30-18 displays Rf (color fidelity) and Rg (vividness) as indicators based on 99 standard colors and the characteristics of the human eye. Display as numerical and color vector graphics.

• CRI Comparison Mode Screen
  
  CRI is the standard color rendering index. The memory value and the current measurement value can be displayed side by side and compared.

It can measure various light sources (LED, HMI, tungsten filament lamp, fluorescent lamp, natural light, flash, etc.) with high precision.

The C-800 uses a CMOS linear image sensor in the light receiving section. To determine the accurate color temperature, we conducted spectral measurements within the wavelength range of 380nm to 780nm. Not only can it accurately measure traditional flashlights and constant light sources (tungsten filament lamps, HMI, etc.), but it can also accurately measure the increasing number of light sources such as LED and fluorescent lamps in photo shooting in recent years.

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  Figure 1 Measuring traditional RGB filters
  The wavelength range that can be covered

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  Figure 2
  equipThe CMOS linear image sensor of C-800 LVF covers the measurement wavelength range with fine spacing

Optical design of the light receiving part

The spectrometer C-800 also fully utilizes optical technology in the light receiving part.
We remove unwanted infrared radiation from the measurement and adjust the angle of the light.
In addition to using dedicated CMOS linear image sensors, the optical system minimizes measurement errors caused by oblique incident light to a certain extent.
It also has a built-in thin dark correction unit and ND filter. Simply rotate the light receiving dial to switch ND filters for dark correction or high-intensity flash measurement.

Humanized product design

We pursue user-friendly product design, including a rotating mechanism for the light receiving part, a uncovered dark correction mechanism, a large 4.3-inch color touch screen, and customized features for the application.

Rich measurement values and wide measurement range

The displayed values are CCT (correlated color temperature), Δ UV (deviation), lux (illuminance), Hlx (exposure), CCi (CC index correction amount), CC # (CC filter number), CCf (CC camera filter), CClf (CC lighting filter), LBi (LB index correction amount), LBCF (LB camera filter), LBlf (LB lighting filter), Rf (color fidelity index), Rg (color gamut index) SSIt（SSI）。 Tungsten filament evaluation index, SSId (SSI daylight evaluation index), TLCI (TLCI evaluation index), TLMF (TLMF evaluation index), x, y (CIE1931 chromaticity coordinates), Hue (hue), Sat (saturation), Ra (CRI mean) color rendering index), R1 to R15 (CRI color rendering index).
In addition, we have achieved a wide measurement range: constant light with a color temperature of 1600 to 40000K and an illuminance of 1 to 200000Lx, flash with a color temperature of 2500 to 40000K and an illuminance of 20 to 20500Lx · s.

memory function

Up to 99 measurement values can be stored in the memory. Due to the ability to input names in advance, it is convenient to manage measurement values. Data can be saved through USB connection.

Customization feature

Custom features allow you to configure settings to suit your usage and environment.

[Host Settings Screen]

• 1 page screen
  

• 2-page screen
  

• 3-page screen
  

Specialized practical software

By connecting the host to the PC via USB and using specialized utility software, you can perform the following operations.
-Confirm aircraft information
-Host settings (toolbox, custom feature changes, preset data editing, hardware settings, initialization)
-Call and save memory data (text data). *Only output measurement values displayed in host text mode
-Display graphics (JPEG, BMP, PNG format files) and save data
-Update host firmware
-Application software C-800 Utility compatible with operating systems: compatible with Windows and Macintosh

• splash screen
  

• Memory Management Screen
  

• Spectral screen
  

• Color rendering evaluation screen
  

• White Balance Screen
  

• Text screen
  

• TM-30 screen
  

Part Name

*Due to improvements, specifications and appearance are subject to change without prior notice. The "movie mode" function of C-700 is not a function of C-800.
*1: When the metering mode is constant light (range L) and the exposure time is automatic.
*2: Illumination is linear
*3: The error is the value obtained by dividing 2 σ of 10 measurements by the average value
*4: The error is measured 10 timesmaximumValue - Minimum Value