18
M. Zoom
Since the different focal length of the lens are suitable for different angles
of the shooting range, the focal length is getting shorter at the same sensors size.
Which means that the smaller focal length lens with larger angle in the view,
the flash area coverage will be larger.
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
Flash Power Level (Guide No.)
60
42
30
21
15
11
7
5
4
54
38
27
19
13
10
7
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 i60A 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.
The effective focal length of the mounted lens varies depending on the camera’s
image sensors size. Air 10s recognizes the image sensor size of each camera sensor format
automatically , users can use auto or manual mode to adjust the optimum flash coverage of
the slave units and make the effective focal length of lens within a range of 24-200mm.