Spectra Professional IV-A Photometer

Spectra Professional IV-A Photometer

The Spectra Professional IV-A # 18002-A is an advanced digital photometer for cinema, video and digital photography.
It has won a technical Oscar, a Grammy and many other international awards.

SPECIAL ORDER ITEM

Description

SPECIFICATIONS: TYPE:

  • The Spectra Professional IV-A Advanced Digital Exposure Meter (ADEM) measures incident and reflected light.
  • Reflected light acceptance angle is 42 degrees.

TECHNOLOGY:

  • For highest accuracy, it uses an advanced front end op amp, a custom sealed electronic circuitry, a multiple range linear circuit controlled by an advanced micro-computer and a custom liquid crystal display with green electro-luminescent lamps.

SENSOR:

  • Silicon photovoltaic cell made up of filters tailored to the spectral response of the film.
  • Swivel head assembly turns 270 degrees.

MEASURING CAPACITY:

  • Direct readout of photographic exposures.
  • Measures contrast ratios and average in f-stop.
  • In illuminance mode, measures illuminance level in footcandles (fc) and lux (lx).

MEASURING RANGE:

  • Sensitivity range from one million to one (20 f/stops).
  • Digital f/stop: f/0.35 to f/128 in 1/10-stop increments.
  • Analog Z/stop 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:

  • From 1:1 to 999:1.
  • Precise 1/10 f/stop increments up to plus or minus 12 stop.

AVERAGING:

  • Average of two readings in f/stop and footcandles or lux.

SENSITIVITY:

  • ISO 3 to ISO 8000 in 1/3-stop increments.
  • FPS: 2 to 360 fps

EXPOSURE TIME

  • 1/8000 of a second to 30 minutes.

RESOLUTION:

  • Digital 0.1-stop;
  • Analog 0.2-stop

ADDITIONAL FUNCTIONS:

  • The Memory Recall switch is a recall stored reading in memory (M1), second reading in memory (M2) and 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.

MEMORY ERASURE:

  • You can erase the stored/memorized readings in MI and M2 by pressing the store (STR) and recall (RCL) switch simultaneously.

CAMERA SHUTTER ANGLE:

  • Includes a complete list of shutter angles and an equivalent compensation table.

BRIGHT GREEN DISPLAY:

  • Electro-luminescent lamp for viewing displayed measurements on the screen.

POWER SOURCE & CONSUMPTION:

  • One 6-volt A544, A544I, PX28l 5mA/ battery. Battery life is approximately one year.

MEASUREMENTS:

  • 14 X 6.4 X 5 cm

Product Details

Product added to wishlist

We use our own and third-party cookies to collect information to improve our services and to analyse your browsing habits. If you continue browsing, you accept their installation. You can configure your browser to prevent their installation.