Guide number, Zooming position, Flash power level (guide no.) – Nissin MG80 Pro Flash for Cameras User Manual
Page 23
Zooming
Position
24mm
28mm
35mm
50mm
70mm
85mm
105mm
Full
1/2
1/4
1/8
1/16
1/32
1/64
1/128
1/256
135mm
200mm
Without
zoom head
Flash Power Level (Guide No.)
60
42
30
21
15
11
7
5
4
20
14
10
7
5
3
2
2
1
54
38
27
19
13
10
8
5
3
50
36
25
18
13
9
6
4
3
45
32
23
16
11
8
6
4
3
42
30
21
15
11
7
5
4
3
39
28
20
14
10
7
5
3
2
32
23
16
11
8
6
4
3
2
29
20
14
10
7
5
4
3
2
27
19
13
10
7
5
3
2
2
Nissin MG80 Pro Guide No. at manual exposure mode (ISO 100 in meters)
For the camera system we support, there are 4 main image sensor sizes:
35mm Full Frame format, APS-C format, 4/3 system format and 1” sensor format.
Guide Number
22