Square of the hypotenuse
EXIF Information extracted from file:
DateTimeOriginal: 2008:05:01 17:43:48
Camera Make: Leica Camera AG
Camera Model: M8 Digital Camera
Exposure Time: 0.5 seconds
ISO Speed Ratings: ISO 160
Exposure Program: Manual
ExposureBiasValue: 0
MaxApertureValue: 1.0
MeteringMode: center weighted average
Flash: unknown: 8
FocalLength: 0.0 mm
Software: Adobe Photoshop Elements 6.0 Macintosh