Guide No. (at ISO 100, in meters/feet)

Normal Flash

Flash

MR-14EX

 

MT-24EX

Output

Both Flash

Single

Both Flash

Single

Tubes

Flash Tube

Heads

Flash Head

 

1/1

14 / 45.9

14 / 45.9

24

/ 78.7

26 / 85.3

1/2

10 / 32.8

10 / 32.8

17

/ 55.8

18.4 / 60.4

1/4

7 / 23

7 / 23

12

/ 39.4

13 / 42.7

1/8

5 / 16.4

5 / 16.4

8.5 / 27.9

9.2 / 30.2

1/16

3.5 / 11.5

3.5 / 11.5

6 / 19.7

6.5 / 21.3

1/32

2.5 / 8.2

2.5 / 8.2

4.2 / 13.8

4.6 / 15.1

1/64

1.8 / 5.9

1.8 / 5.9

3

/ 9.8

3.3 / 10.8

High-speed Sync (1/1 flash output)

Flash

MR-14EX

 

MT-24EX

 

Output

Both Flash

Single

Both Flash

Single

Tubes

Flash Tube

Heads

Flash Head

 

1/125

7.9 / 25.9

7.9 / 25.9

15.9

/ 52.2

17.2

/ 56.4

1/160

7.6 / 24.9

7.6 / 24.9

14.9

/ 48.9

16.2

/ 53.1

1/200

7.2 / 23.6

7.2 / 23.6

13.3

/ 43.6

14.4

/ 47.2

1/250

6.8 / 22.3

6.8 / 22.3

11.9 / 39

12.9

/ 42.3

1/320

6.2 / 20.3

6.2 / 20.3

11.5 / 37.7

10.6

/ 34.8

1/400

5.5 / 18

5.5 / 18

9.4 / 30.8

10.2

/ 33.5

1/500

4.9 / 16.1

4.9 / 16.1

8.4 / 27.6

9.1 / 29.9

1/640

4.4 / 14.4

4.4 / 14.4

7.5 / 24.6

8.1 / 26.6

1/800

3.9 / 12.8

3.9 / 12.8

6.7 / 22

7.2 / 23.6

1/1000

3.5 / 11.5

3.5 / 11.5

5.9 / 19.4

6.4 / 21

1/1250

3.1 / 10.2

3.1 / 10.2

5.3 / 17.4

5.7 / 18.7

1/1600

2.7 / 8.9

2.7 / 8.9

4.7 / 15.4

5.1 / 16.7

1/2000

2.4 / 7.9

2.4 / 7.9

4.2 / 13.8

4.5 / 14.8

1/2500

2.2 / 7.2

2.2 / 7.2

3.7 / 12.1

4.1 / 13.5

1/3200

1.9 / 6.2

1.9 / 6.2

3.3 / 10.8

3.6 / 11.8

1/4000

1.7 / 5.6

1.7 / 5.6

3 / 9.8

3.2 / 10.5

1/5000

1.5 / 4.9

1.5 / 4.9

2.6

/ 8.5

2.9

/ 9.5

1/6400

1.4 / 4.6

1.4 / 4.6

2.4

/ 7.9

2.6

/ 8.5

1/8000

1.2 / 3.9

1.2 / 3.9

2.1

/ 6.9

2.3

/ 7.5

40