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May 17, 2017 at 5:32 PM
#8155
Taro, Zahi posits that in WCUFO photo #800, the object is 3.5 meters at 7 meters away from the camera. Using the camera-object distance equation (D/d=f/h) which you lately have concerned yourself with, I found the size of object image on film as 24 mm. This gave me a focal length of 42 mm, which contradicts the 55 mm focal length value Meier asserts.
Did I make any mistake?
Is that equation not applicable to cases when the camera is focused on nearby objects and not at infinity?