norly
13-Feb-2009, 09:19
hi. I have a mathematic question for all you bright guys.
For a while a go I needed to calculate how big surface on a floor the camera would cover (angle of view?) based on the lens and the distance from camera/object. I didn't succeed very well, so I thought that you people might have a better formula for it...
The format is 4x5" (10x12 cm).
The distance between the floor and the film is 8m in teh example.
The lens has a output of 18 degrees i think (I dont remember how I got that number but its not correct)
Lets for the examples say its a 90mm Nikkor SW taking a 4x5 NEG from 10 meters hight. My calculation should work if I can calculate how to decide the out-falling angle on the lens. Any tips?
Se the photo with my failed calculation... Good luck
http://www.rasmusnorlander.se/forums/angleofview.jpg
For a while a go I needed to calculate how big surface on a floor the camera would cover (angle of view?) based on the lens and the distance from camera/object. I didn't succeed very well, so I thought that you people might have a better formula for it...
The format is 4x5" (10x12 cm).
The distance between the floor and the film is 8m in teh example.
The lens has a output of 18 degrees i think (I dont remember how I got that number but its not correct)
Lets for the examples say its a 90mm Nikkor SW taking a 4x5 NEG from 10 meters hight. My calculation should work if I can calculate how to decide the out-falling angle on the lens. Any tips?
Se the photo with my failed calculation... Good luck
http://www.rasmusnorlander.se/forums/angleofview.jpg