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  Shown on this page are excerpts from the Principal website to give an overview of the
product range. For vast information that is readily available, we invite you to visit
Principal website at the link provided at the end of this page.		  
     
       
 
DUALMASTER L-558 & L-558CINE
Measure the unknown with - - - the L-558 DUALMASTER
Darkness Spot (1) measurements
1 degree spot meter that measures reflected flash output down to an amazing f/2.0(@ISO100), and reflected ambient down to EV 1 with complete exposure data, easily readable in digital Elector-Luminescence readout conveniently placed along the bottom edge of the 1 degrees spot  finder.

Radio Triggering System
Electronic flash units can be remotely triggered with the meter's optional, internal, multi-channel radio triggering device for wireless metering.

Analyzing Function
In this mode, a simultaneous reading of flash and ambient light is analyzed.The exposure readings are display in three convenient methods on the LCD panel.
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 scale

Full, 1/2 or 1/3 step selectable readings
Both shutter speeds and apertures can be displayed in either full, 1/2 or 1/3-step increments to match your film or digital camera.
Selecting Full, 1/2 or 1/3-step increments is quick and easy with custom setting.

Memory Mode
Nine memory banks are available in both Aperture priority and Shutter Priority Modes,making contrast evaluation and averaging possible in both modes(558Cine:Shutter priority only)

Exposure, Calibration and Filter Compensation
Independent incident and reflected Exposure compensation of +/-9.9EV, Calibration compensation of +/-1.0 EV and Filter compensation +/-5.0

Cumulative Flash Exposure
Unlimited number of cumulative flash exposure are calculated and the total light value is digitally displayed along with the number of exposures.

Optional Step up Ring (Lens Hood)
For attaching filters to the front of the lens (up to 40.5mm filter) Also acts as a lens hood preventing erroneous light measurements caused by lens glare.
 
L-558CINE Additional Features
LUX 0.63 to 190,000
Foot-Candle 0.12 to 180,000
Cｄ/m2 0.25 to 190,000
Foot-Lambert 0.07 to 190,000
Shutter Angle setting 5°逆o270°蟻t 5°虐top+ 144°蟻nd 172°祈ilter factor number
compensation 85-, n3-, n6-, n9-, A3-, A6-, A9-
Module RT-32
The Radio Transmitter Module plugs directly into a built-in compartment behind the battery door. The Transmitter module triggers the electronic flash units wirelessly as the meter takes a measurement. Channel ID's are easily selected through the meters built-in software(CH 1-16 Single Remote Triggering, CH 17-32 Remote control "Quad Triggering"), Compatible with Sekonic and Pocket Wizard Digital Radio Slaves.		 Radio Receiver RR-4
Four digitally coded channels provide reliable triggering of remote electronic flash units. Its simple features provide easy and dependable operation. Connecting cables for specific electronic flash units required.
Radio Receiver RR-32
Thirty-two digitally coded channels provide added security in high radio interference environments, preventing false or missed triggering. Its unique features such as "Quad Triggering"(selective triggering of individual/groups of electronic flash units) offers the photographer creativity control and performance even in the most challenging photographic assignments. (The first four channels of the RR-4 are compatible with the first four channels of the RR-32).		 Step Up Ring
For attaching filters to the front of the lens (up to 40.5mm filter).Also acts as a lens hood preventing erroneous light measurements caused by lens glare.
（for L-558/558CINE/L-608/608CINE）
 
 
 
  Sekonic L-358 Flash Master
Analyzing Function - In this mode, a simultaneous reading
of flash and ambient light is analyzed. The exposure
readings are displayed in three convenient methods on the
LCD panel.
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 scale
Optional Radio Triggering Module - Electronic flash units
   can be remotely triggered with the meter's optional,
  internal, multi-channel radio triggering device for wireless
  metering. Individual measurements of several electronic flash
  units, is accessed through the meter's built-in Quad
  Triggering software. Up to four electronic flash units can be
   independently triggered and measured wirelessly by a touch
   of the meter's measuring button. (Compatible with Sekonic
   and PocketWizard radio receivers)
Cumulative Flash Exposure - Unlimited number of cumulative
   flash exposures are calculated and the total cumulated light
   value is digitally displayed along with the number of  
   exposures.
Exposure and Calibration Compensation - Exposure
   compensation of +/-9.9 EV. Calibration of +/- 1.0EV.
Memory Mode - Nine memory banks are available in both
   Aperture Priority and Shutter Priority Modes, making
   contrast evaluation and averaging possible in both modes
All-Weather Design - All buttons, switches and
   compartments including the Lumisphere and Lumidisc are
   sealed and the meter housing has been constructed with
   durable, rugged conditions in mind, assuring reliable
   performance under any working conditions
Optional NP Finders - Parallax free 1deg., 5deg. and 10deg.
  (angle of  acceptance) precise spot metering viewfinders offer
  precise  reflected-light measurements of both flash and
  ambient light.  NP Finders attach quickly and easily to the
  meter’s  receptor head.
Cine Speeds - Complete range of frame speeds from 2 to
   360 f.p.s. (Frames per second)
 
Specifications subject to change without notice.
NP Finder 1deg, 5deg.,10deg.(for L-358)
All-weather designed
Non-Parallax 1°, 5°,10°(angle of
acceptance) spot metering viewfinders
offer precise reflected light measurements
of both flash and ambient light.
  Measuring Range (ISO100)
 
Ambient NPF 1 deg. : EV-5 to EV 24.4
NPF 5 deg. : EV3 to EV 24.4
NPF 10deg. : EV2 to EV 24.4
Flash NPF 1 deg. : f8.0 to 90.9
NPF 5 deg. : f4.0 to 90.9
NPF 10deg. : f2.8 to 90.9
  Sekonic L-308S FLASHMATE
  Built-in sliding Lumisphere provides easy
changeover from incident to reflected light
measuring: Lumidisc provided for contrast
measuring
Cord or cordless flash measuring
LCD panel provides large clear display of
measured exposure data,ISO setting and battery power
indicator.
Single mode selection button for setting ambient
   or flash measuring
It features a choice of Full, 1/2 or 1/3 step
selectable display in aperture and shutter speed.
±0.1 EV repeat accuracy
Energy efficient AA battery operation
Supplied with Lumidisc, case, neck cord and  
   battery
    Standard accessory
  Lumidisc for L-308S
Easily attached to the meter and used to adjust contrast of lighting and to measure Luminance. Supplied with soft case.

 
  Sekonic L-398A Studio Deluxe III
  Swivel head and needle lock facilitate easy and
accurate readings
Amorphous photocell eliminates need for batteries
Lumidisc for adjusting illumination contrast and
measuring illumination intensity
Lumigrid for measuring reflected light
Memory pointer retains prior reading
    Optional Accessory
  Direct Reading Slide Set
Slide set allows incident measurements when used with the L-398 series.
No dials to rotate. Easy and fast, with 11 different slides and case
  Sekonic L-208 Twinmate
  Instant switch between incident/reflected light measurement
Instant reading of aperture/shutter combinations with the
dial ring
One-hand controls with the guide needle position retained
during 15 seconds after measurement
Light receiving angle of 33 deg.
Easy attachment to camera shoe by using the shoe mounting
plate