Re: Angle of view instead of focal length
Alfred Molon <firstname.lastname@example.org> wrote:
> In article <email@example.com>, Floyd L. Davidson says...
>> I take you are unaware that there is indeed an EXIF
>> field for the field of view in degrees. At least Nikon
>> and Canon both provide that data.
>> Camera Model Name : NIKON D3S
>> Field Of View : 72.7 deg (1.96 m)
>> Focal Length : 24.0 mm (35 mm equivalent: 24.0 mm)
>> Camera Model Name : NIKON D4
>> Field Of View : 68.5 deg (2.04 m)
>> Focal Length : 24.0 mm (35 mm equivalent: 26.0 mm)
>> Camera Model Name : NIKON D800
>> Focal Length : 800.0 mm (35 mm equivalent: 800.0 mm)
>> Field Of View : 2.5 deg (2.09 m)
>> Camera Model Name : Canon EOS 60D
>> Focal Length : 50.0 mm (35 mm equivalent: 78.6 mm)
>> Field Of View : 25.8 deg
> Interesting. Which cameras support this field?
> And is there a difference between field of view and angle of view?
There are different values used for field or angle of view. Sometimes
it's calculated across the sensor diagnonal, i.e. the diameter of the
image circle, sometimes across the width of the sensor. The number I
find much more photographically useful is the angle derived from the
width across the sensor in normal (landscape) mode. That tells me how
wide the standard view is without seriously tilting the camera to
squeeze more width out corner to opposite corner across the diagonal.
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