Viewing Angle of Camera

[techtiger1]

Originally Posted by petek

I measured it tonight: about 60 degrees field of view.

Nice. Data you guys. I asked a simliar question before but it was about the actual range of the cmu2. How far can that camera see before the object it out of sight. I looled thru the manual but could not find anything on the distances. Thanks everyone.

[Alan Anderson]

Originally Posted by techtiger1

Nice. Data you guys. I asked a simliar question before but it was about the actual range of the cmu2. How far can that camera see before the object it out of sight. I looled thru the manual but could not find anything on the distances. Thanks everyone.

It's a camera. It doesn't have a range limit. How far away it can detect something would depend on the size and brightness of what it's looking at. I am certain it would have no problems seeing an object nearly a hundred million miles distant, if that object were sufficiently large and well lit.

[Joe Johnson]

60 Degrees both in the UP/DOWN and LEFT/RIGHT direction?

Joe J.

[petek]

Originally Posted by Joe Johnson

60 Degrees both in the UP/DOWN and LEFT/RIGHT direction?

Joe J.

I measured just left/right.

[Al Skierkiewicz]

Originally Posted by Joe Johnson

60 Degrees both in the UP/DOWN and LEFT/RIGHT direction?

Joe J.

Joe,
The lens is listed as a 4.9 mm, F2.8 lens(I had to search but found it on one of the CMUII sites). The target area is 4.86 mm x 3.64 mm. for a diagonal of nearly 1/4", the listed specification for this device. Plug in the numbers for the diagonal and the focal length and it comes out to about 60 degrees. Since the aspect ratio for this camera is 4:3, the horizontal look angle is less than 60 degrees and the vertical is even smaller. This of course is in a perfect world and the lens in this camera is not self compensating for focus, distance to pickup, etc. so the FOV (field of view) will vary from camera to camera. According to my lens calculator (fudging for the tiny pickup area, my calc only goes down to 1/2") FOV (horizontal) is 22-25 ft. at 20 ft from the camera.

[petek]

Originally Posted by Al Skierkiewicz

Joe,
...According to my lens calculator (fudging for the tiny pickup area, my calc only goes down to 1/2") FOV (horizontal) is 22-25 ft. at 20 ft from the camera.

That correllates well with my measurement of about 9 ft (left:right) at a radius of 9 ft. If the aspect ratio is 4:3, then you should expect about 60 degrees horizontally x 45 degrees vertically. I wasn't trying to measure the FOV to high accuracy - figure 9 ft. +/- 3 in. - but somehow I doubt that FOV accuracy is going to be that critical a factor with these cameras...