UNDERSTANDING PANASONIC AJ-HDC27H
© ALLEN YEUNG 2008
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UG_AJ-HDC27H_v1.doc
SENSITOMETRY TESTING METHOD
Testing Equipment
1.
18% Reflection Grey Card
2.
Incident and Reflected Light Meter
3. Waveform
Monitor
4. Camera
with
Lenses
5.
Adjustable Light (approx. 2000 foot-candles)
Testing Procedure
Background should be kept at 0 foot-candle throughout testing
Fill grey card to 70% of the screen
Set shutter speed to 1/50s and T-stop to 2.8
Make sure the incident reading at grey card and reflected reading at camera are the same
1.
Adjust light level to 0 IRE on waveform monitor
2.
Adjust light level to 5 IRE and measure incident reading at grey card
3.
Repeat and write down measurement until 110 IRE
Changing Dynamic Range and Transfer Characteristics
Highlight
Dynamic LVL (D)
Or
Knee Point and Knee Slope
Shadow Transition
BALCK STR LVL (BL)
Shadow Detail
BLACK STR (BS)
Contrast
MASTER GAMMA (MG) (0.75 hard, 0.35 soft)
Example Gamma:
D500MG0.45BL05% / D200MG0.75BS-3
