Quantum CALCU-LIGHT X Operating Instructions Manual
QUANTUM CALCU-LIGHT X
OPERATING INSTRUCTIONS
1. INTRODUCTION
Diagram 1
This manual is your guide to operating the Calcu-Light. Please read it
completely to fully benefit from the unique capabilities of your
instrument.
Refer to diagram 1 throughout this manual. There are two switch
controls, MEASURE and MEMORY. A LIGHT TURRET rotates to
enable either the incident or reflected light measurement mode. A
calculator dial provides f-stop, film speed, shutter speed, exposure value
(Ev) and cine (frames-per-second) values.
2. SETTING FILM SPEED
First, rotate the outer dial rim until the reflected and incident
symbols lie on either side of the digital display
window. This exposes the film speed dial, in the finger slot, on the right hand side of Calcu-Light.
Next, place your index finger into the slot and your thumb on the dial rim. Squeeze the rim and dial together and turn
them. The ASA and DIN numbers will change to the new values. If the desired value is not reached, reset the rim to
its original position, and again, rotate the rim and dial.
See specifications for the exact designations of film speed "dot" markings.
3. SETTING AND REMOVING LIGHT TURRETS
The standard Calcu-Light turret rotates to take either 30° reflected light or 180° incident light measurements. To
change the mode, loosen the turret thumbscrew approximately 4 or 5 turns. Lift and rotate the turret and tighten the
screw.
The selected mode is indicated by whichever turret symbol, reflected or incident
lies at the front (dial side)
of Calcu-Light. A mark on the instrument housing
serves as a reminder of the mode. The white dome for incident
light, the lens for reflected light.
The techniques of incident and reflected light measurements are covered in Section 5.
To remove the turret turn the thumbscrew counterclockwise until it is free. Any of the accessory turrets described in
section 8 can now be mounted onto Calcu-Light.
4. TAKING A LIGHT MEASUREMENT
Point Calcu-Light in the desired direction and press the MEASURE control. A reading will appear in the display