Nikon 1723 Instruction Manual - Page 98
Using Built-In Speedlight-continued
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Using Built-In Speedlight-continued , • Flash shooting distance range Flash shooting distance for the built-in Speedlight changes according to the film speed in use and aperture setting . ISO film speed Guide number m/ft. Aperture value 25 6/ 20 - 1.4 2 2.8 4 5.6 8 50 100 200 400 800 8.5/28 12/39 17/56 24/79 34/ 112 Flash shooting distance range - 1.4 2 2.8 4 2-8.5m/6.6-27.9 ft . 1.4 2 2.8 4 5.6 1.4-6m/4.6- 19.7 ft . 2 2.8 4 5.6 8 1-4.2m/3.3-13.8 ft. 2.8 4 5.6 8 11 0.7-3m/2.3-9.8 ft . 4 5.6 8 11 16 0.6-2.1m/2.0-6.9 ft . 5.6 8 11 16 22 0.6-1 .5m/2.0-4.9 ft . 8 11 16 22 32 0.6-1 .1m/2.0-3.6 ft . 11 16 22 32 - 0.6-0.8m/2.0-2 .6 ft . • The maximum flash shooting distance can also be calculated by dividing the guide number by the selected aperture value. Example: When f/2.8 is selected with ISO 100 film using the camera's built-in = Speedlight, the maximum flash shooting distance will be: 12/2.8 approx. 4.2m or 39/2.8 = approx. 13. 8 ft . 98