Understanding Sport Meter As Exposure Index (Ei) Assist - Panasonic AU-EVA1 Manual

4. Understanding advanced features

4-4. Understanding sport meter as Exposure Index (EI) assist

Measuring video level and stop settings to achieve desired exposure, can be performed easily with
the SPOT METER function.
Overwiew
The graph on the figure 4-1 shows the AU-EVA1's V-Log gamma curve. It is designed to have the
same characteristic as the original VARICAM's (35 and LT) curve hense, LUTs developed for
VARICAM series can also be used for the AU-EVA1's footage, Please note that EVA1 exposure
latitude is 14 stop while VARICAM35/LT is 14.5 stops..
18% Gray
-8 Stops
10-bit code value of gray with reflection of 18% is defined as 433 (42% in IRE).
Input
reflection
[%]
0
18
90
18%
Fig.4-1 AU-EVA1's V-Log curve
IRE [%] 10bit Code value
7.3
42
61
63
+6 Stops
+6.5 Stops
36% 144%
72% 288%
V-Log
128
433
602
VARICAM
576% 2304%
1152%
12bit Code value
512
1732
2408