Nikon SB-16 instruction manual For manual M operation

-CONTROLS IN DETAll-continued---------

For manual (M) operation

After setting the ASA/ISO film speed and zoom setting knob on the exposure calculator dial , focus on the sub- ject; then look at the lens and read off the focused dis- tance to determine exactly how far away the subject actually is. Now, find the end of the color-coded line directly above the flash-to-subject distance and read off the f-number next to this line. Then, set this aperture on your lens.

30

Example

When using ASAIISO 100 (with the zoom head set at N for a 35mm lens) and the subject is located 1.5m (5 .0 ft.) away, the correct aperture is approx . f/22 . With a subject 3m (10 ft.) away, the aperture is approx. fl11.

Without referring to the exposure calculator dial , you can also determine the flstop by using the following equation :

guide number

flstop =

flash-to-subject distance

With ASAIISO 100 film and meters (and the zoom head set at N for a 35mm lens), the S8-16'sguide number is 32 . If the subject is 4 m away, divide 32 by 4 to get fiB . With ASAIISO 25 fi lm and feet (and zoom head set at N for a 35 mm lens), the guide number is 52. Therefore, if the subject is 20 ft . away, divide 52 by 20 to get approx . f/2.B.