The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is
A. f/H sec θ
B. f sec θ/H
C. f/H
D. f/H cos ½θ
Answer:A
The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is
A. f/H sec θ B. f sec θ/H C. f/H D. f/H cos ½θ