Nikon D90 - Digital Camera SLR Manuel d'utilisation - Page 18

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Determining Number of Photos

For spot photography, take multiple photos as appropriate. More are better than less!

For route photography and aerial mapping, one must determine the length of each leg.

Using a map, determine each leg length in statute miles. Multiply the leg length in statute

miles by 5280 feet per mile. Divide that number by the length of each photo less the

photo overlap (see "Selecting a Time Interval" above). The result is the number of photos

that need to be taken during the leg. Program the Multi Function Timer Remote Control

with the result. For example, for a leg length of 8 miles and a 25% overlap of photos with

each photo 800 feet wide, 5280x8=42,240. (100%-25%) x 800 feet = 600 feet.

42,240/600 = 70 photos.