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6. Advanced Functions
4. How to use an incident illuminance (LUX or FC) meter (L-758DR/758D)
1. Turn the Lumisphere retracting ring to lower it to the
(retracted) mark position.
2. Make sure that any compensation Exposure/Calibration
compensation: see page 36 & 37, Compensation of
camera exposure profile: see page 46 is canceled.
3. Set the meter to EV mode and ISO 100.
4. Place the meter parallel to the subject and take a
measurement.
5. The measured EV can be converted to find the
brightness level with the conversion table below.
* EV value → Foot candle (FC) conversion table
-2
-1
0
1
2
3
4
5
6
7
8
0.06
0.12
0.23
0.46
0.93
1.9
3.7
7.4
15
30
59
0.08
0.16
0.33
0.66
1.3
2.6
5.3
11
21
42
84
9
10
11
12
13
14
15
16
17
18
19
120
240
480
950
1900
3800
7600
15000
30000
61000
120000
170
340
670
1300
2700
5400
11000
22000
43000
86000
170000
EV
0 0.5
0
0.5
Decimal places
EV
Decimal places
Reference:
• L-758CINE can read LUX or FC directly when the custom setting function is used (refer to
page 40).
* EV value → Lux conversion table
-2
-1
0
1
2
3
4
5
6
7
8
0.63
1.3
2.5
5.0
10
20
40
80
160
320
640
0.88
1.8
3.5
7.1
14
28
57
110
230
450
910
9
10
11
12
13
14
15
16
17
18
19
1800
3600
7200
14000
29000
58000
120000
230000
460000
930000
1900000
EV
EV
Decimal places
0
0.5
0 0.5
Decimal places
1300
2600
5100
10000
20000
41000
82000
160000
330000
660000
1300000