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What image do I get with glasses of different sizes with DIY install cameras?
I have an assigned parking space for vehicles on the road from my house. Its approximately 35 to 40 feet away from where the camera is. Can I get a recognizable enlightened about one day IR / camera night and the lighting to be okay? What kind of view you get with a 6mm lens, a 12mm lens, a lens of 16mm or 25mm lens? Normal street lighting and image captured camera DVR. My current camera works well in daylight, but stops working at dusk. The best size of the lens please? Some his advice.
The lighting near the street lights may be around LV 3, which corresponds to an exposure of about 1 second at f/2.8 and ISO 100. Lighting in a more distant will be proportionately smaller. If you have an infrared light into a spotlight aimed right at your car, you should be able to do better than this. The field of vision you get with your lens depends on the size of the active area of imager as much as the lens focal length. Assuming that the objective is quite straight, ie straight lines in the "real world" are represented as lines in a plane without a lot of images or barrel distortion image, the camera-to-subject distance divided by the field of view is equal to the lens focal length divided by the width of the active area of the printer. The "1 / 2 inch of" trade size of images in my first digital camera was actually 6.40 x 4.80 millimeters, which is almost as big as you can expect an imaging device for your application. Mine was a camera. Many of use of video images are smaller than that. Assuming yours is half that size, ie 3.20 x 2.40 mm and are 36 feet away, and you want a field of view of 6 feet by 8 feet (maybe a little narrow, but this will give the stadium, and the image you want great as you can manage to get the amount of detail you want) in mm focal length f is given by the formula f mm / 3,20 mm = 36 m / 8 feet, or a focal length of 14.4 mm. If this is really a good approximation for the size of the active area of its images, your best bet is to start with a lens of 12 mm, thus giving a field of view between 10 and 11 feet wide and 8 feet high.
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