Angle of view calculation

[goodie 0]

does any one have angle of view calculation formula.

 

What I found on google is just the calculator but I need the real formula behind it. Anyone has it? Please share.

 

Thanks.

[varascope 0]

angle=2arctan * D/2F D=sensor size F=Focal length

 

Is this what you are looking for?

[goodie 0]

so, in that case what is the angle of view of this camera specs? (please see attachment)