Sekonic L-758DR User Manual download pdf (Page 48)

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7. Camera Exposure Profiling

1. Calibration testing for exposure profiling

Since no two digital cameras, camera and light meter or different types of film are likely to agree on

the same exposure, they need to be calibrated. The L-758DR (L-758D/L-758CINE) can be pro-

grammed to match the sensitivity of film or digital camera sensor for prefect exposure control. In

addition, since film and digital cameras have their own unique dynamic range, clipping point (expo-

sure tolerance) and varying ISO sensitivity they need to be profiled. To ensure repeatable accurate

and consistent measurements and to be aware of the tonal or dynamic range of a particular type of

film or digital camera before making a photograph, the L-758DR/L-758D/L-758CINE can be

programmed to stored, recall and display up to three different digital cameras or film types.

Below are the following settings that can be programmed into the L-758DR/L-758D/L-758CINE.

1. Compensation value

Compensation value (aperture and shutter speed) can be programmed for a specific camera

and hand-held meter. Compensation adjustment is within a +/- 5EV range in 1/10 step incre-

ments.

2. Clipping point (-)

The point at which a given lighting situation (pre-exposure) has surpassed the responds level of

a sensor or film and alerts the shooter of a under exposure situation (Pre-Exposure Warning).

These point can be custom set from -7EV to 0EV in 1/10 increments.

3. Dynamic range (-)

The point at which the sensor or film has reached its maximum reproducible shadow details

without pixel noise or grain. Dynamic range (-) adjustment is set from -7EV to 0EV in 1/10 step

increments.

4. Dynamic range (+)

The point at which the sensor or film has reached its maximum reproducible highlight details

without blooming or highlight block up. Dynamic range (+) adjustment is set from 0EV to +7EV

in 1/10 step increments.

5. Clipping point (+)

The point at which a given lighting situation (pre-exposure) has surpassed the responds level of

a sensor or film and alerts the shooter of an over exposure situation (Pre-Exposure Warning).

These point can be custom set from 0EV to +7EV in 1/10 increments.

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Sekonic L-758DR User Manual Page 48