Aerial Photography Math Problem

[WMinear]

Hi,

This is my first post, so please try and take it easy on me But I am trying to figure out a little math problem...

If I take a Lens say a 25mm fixed lens, and I'm 50 feet off the ground, How much of the wall will I see when I look at it on my computer. I'm shooting with an EOS 40D, so the sensor is not a full frame sensor. Also we are assuming you are completely perpendicular to the ground.

What I am actually doing is Aerial Photography with a remote controlled helicopter. My Uncle is a civil engineer and he wants me to come take some aerials for him.

Thanks in advance.
Wes

 

[Derrel]

45 feet x 30 feet on a 40D with a 25mm lens. 54.08 feet on the diagonal axis of the frame.

GO here for the calculation application on-line.

Field of View - Rectilinear and Fisheye Lenses

 

[WMinear]

Derrel,

Thank you so much for your the link.

That is exactly what I needed.