[ptx] Re: Degrees of view

[Helge Kippenberg]

Hi Lluís Pàmies i Juárez,

  if you only want to calculate the degree of view for rectlinear 
lenses, you can implement the following formula:

f: focal length
b: size of sensor (different for lanscape or portrait)
alpha: half of the field of view

alpha = arctan((b/2)/f)
fov   = alpha * 2

You can verify this by HUGIN. i.e: f=8mm, crop=1 (-> b=24mm->portrait), 
fov=112.619°

Hope this helps,

Helge

> From: Llu?s P?mies i Ju?rez <llpamies at tinet.org>
> Subject: [ptx] Degrees of view.
> To: ptx at email-lists.org
> [...]
> In wich section of Hugins source can I found the code for calculate
> the degrees of view?
> 
> Thanks for all, and sorry for my bad english.
> --
> Lluís Pàmies i Juárez
> 
> 
> 
>