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SPECTRA
PROFESSIONAL IV-A
The Spectra® Professional® IV-A # 18002-A is an Advanced
Digital Exposure Meter (ADEM) for motion picture video and digital
photography. This Internationally Acclaimed Industry Standard
has received Technical Academy (OSCAR), Engineering Emmy and
numerous international awards.
SPECIFICATIONS:
TYPE: Spectra Professional IV-A Advanced
Digital Exposure Meter (ADEM) for measuring both incident and
reflected light. Reflected light acceptance angle is 42 degrees-square.
TECHNOLOGY: For highest accuracy and reliability
it utilizes an advanced front end op amp, a custom sealed hybrid
electronic circuitry, a multiple range linear circuit controlled
by advanced mirco-computer and a custom liquid crystal display
with aviation green backlit electro-luminescent lamps.
LIGHT SENSOR: Silicon photovoltaic cell with
computer selected glass filters tailored to the spectral response
of the film. Swivel head assembly turns 270 degrees.
MEASURING CAPABILITY: Direct readout of photographic
exposures. Measure contrast ratios and average in f-stop. And
in illuminance mode, measures illuminance level in footcandles
(fc) and lux (lx).
MEASURING RANGE:
One million to one (20 f/stop) widest sensitivity range available.
Digital f/stop: f/0.35 to f/128 in 1/10-stop increments. Analog
f/0.7 to f/45 in 1/3-stop increments.
PHOTOGRAPHIC
ILLUMINANCE: Footcandles 0.1 to 70,000 and lux 1 to
100,000.
CONTRAST RATIO: Calculates
ratio of two readings: key plus fill to fill light alone, from
1:1 to 999:1. F/stop Difference: The difference in f/stop between
a new reading and the last stored/memorized measurement is display
in precise 1/10-stop increments up to plus or minus 12 f/stop.
AVERAGING: Average of two readings and/or
continuous averaging in f/stop and footcandles or lux.
FILM SPEED: ISO 3 TO ISO 8000 in 1/3-stop increments
FRAMES PER SECOND: 2 TO 360 (for motion picture
cameras).
EXPOSURE TIME: 1/8000 sec
to 30 minutes.
RESOLUTION: Digital
0.1-stop; Analog 0.2-stop.
ACCURACY:
Digital 0.05 f/stop. Calibration is traceable to National Institute
of Standard Technology (NIST) Washington, D.C.
ADDITIONAL
FUNCTIONS: Memory Recall switch is a recall stored
reading in memory (M1), second reading in memory (M2) and/or
the ratio average and f/stop difference of the two readings.
INSTANT RECALL OF ALL MEASUREMENTS AND CALCULATIONS:
By pressing the recall (RCL) switch, the first stored/memorized
reading (M1), the second stored/memorized reading (M2), contrast
ratio or brightness (f/stop) difference, average footcandles/lux
or average f/stop, can be recalled.
IMMEDIATE
UPDATE OF ALL EXPOSURE CALCULATIONS: If the film speed
(ISO), frames per second/Cine (FPS) or exposure time/Still (TIME)
settings are changed, the f/stops are immediately recalculated
and displayed in normal, f/stop difference, or average modes.
MEMORY ERASURE: You can erase the stored/memorized
readings in memory (MI) and memory (M2) by pressing the store
(STR) and recall (RCL) switch simultaneously.
CAMERA
SHUTTER ANGLE: Complete list of shutter angles and
equivalent compensation table conveniently provided in the instructional
material.
BRIGHT GREEN DISPLAY: Electro-luminescent
lamp for viewing displayed measurements at very low light levels.
POWER SOURCE & CONSUMPTION: One 6
volt camera battery; No's A544, A544l, PX28l. 5mA/reading. Data
Retention 5?A. BATTERY LIFE: Approximately one year with normal
use
DIMENSIONS & WEIGHT: 5-1/2”
X 2-1/2” X 2”; Approximately 6 ounces.
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UNIT: 370 € + VAT
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