FOV <--> Zoom

On Mon, 28 Apr 2003 18:37:15 GMT, Victor Irzak
wrote:

Hello,

I am pretty new in computer vision and photography.

I have a camera Logitech QuickCam Pro 4000. It can zoom from 50 to 150.

What do these numbers mean and how do I convert these numbers into degrees?

TIA,
Victor
It sounds like the "35mm equivalent focal length". If so, you can use
the math of 35mm:

50mm is a "normal" lens on 35mm film. I dont know where this comes
from, but---coincidentally---the FL is about the same at the film
diagonal (43mm)

The FOV of a "normal" lens is about 45 degrees.
**************************
Mark Herring, Pasadena, Calif.
Private e-mail: Just say no to "No".

"Mark Herring" wrote in message
...
On Mon, 28 Apr 2003 18:37:15 GMT, Victor Irzak
wrote:

Hello,

I am pretty new in computer vision and photography.

I have a camera Logitech QuickCam Pro 4000. It can zoom from 50 to 150.

What do these numbers mean and how do I convert these numbers into
degrees?

TIA,
Victor
It sounds like the "35mm equivalent focal length". If so, you can use
the math of 35mm:

50mm is a "normal" lens on 35mm film. I dont know where this comes
from, but---coincidentally---the FL is about the same at the film
diagonal (43mm)

You answered your own question here. The normal angle of view considers the
diagonal of the format, or close to it.

The FOV of a "normal" lens is about 45 degrees.
**************************
Mark Herring, Pasadena, Calif.
Private e-mail: Just say no to "No".