How to set field of view angle in perspective projection ?

Hi, Is there a way to set the field of view angle in perspective projection ? (i wish to controll the distortion).

I axplored the axes camera properties but couldnt find it there. I basically wish to set the FOV variable of the image in the link below.

http://potatoland.org/glart/week3/perspective_proj_glupers.gif

thanks