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subject-distance × 67focal-length × 25
calculations × 17
lens × 8
focus × 8
field-of-view × 7
perspective × 7
focus-distance × 6
depth-of-field × 5
autofocus × 4
zoom × 4
macro × 3
pixels × 3
aperture × 2
portrait × 2
optics × 2
sharpness × 2
light × 2
telephoto × 2
sensor-size × 2
3d × 2
magnification × 2
canon × 1
flash × 1
exposure × 1