2) Set the zoom setting knob
Turn the zoom setting knob at the center on the dial until the zoom setting index is opposite the same letter as you selected in setting the zoom head. For example, if you set the zoom head at T for a 85mm lens, the zoom set- ting knob must also be set at T.
Note: The W, setting on the dial is used when the wide-flash adapter is attached to the flash unit with the zoom head set at WI.
3) Determine the exposure
Depending on which shooting mode you 've selected, read off the usable f/stop(s) from the dial. In either the TTL or non-TTL automatic mode, more than one f/stop is usable. When choosing an aperture, make sure that your subject is within the auto shooting range indicated by the color-coded lines. The larger the aperture (the smaller the f-number) you select, the greater the maximum shooting distance, whereas the smaller the aperture (the larger the f-number), the less the maximum shooting distance. If the subject distance remains the same, the larger the aperture you select, the less depth of field in the final photograph; however, the recycling time is shorter. On the other hand , the smaller the aperture, the greater the depth of field , but the recyc ling time is longer. Therefore, in choosing an flstop , all these factors should be taken into consideration .
