The notes for this exercise are confusing. If you are using a digital camera the viewfinder magnification factor plays a role making it difficult to determine the standard focal length by looking through the lens and comparing it to what your other eye sees.
When I tried this 55mm seemed to result in similar sized objects.
According to the instruction manual, the viewfinder magnification on my camera is .78 and the standard focal length is 35mm. On a 35mm format camera the standard focal length is about 50mm.
I took the following shots to show wide angle, standard focal length for my camera and telephoto.
Standard focal length 35mm
Wide angle 18mm
 |
Telephoto 70mm
50mm (objects appeared similar size)
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