1 Chills and Tingling fingers and Skin symptoms (4 causes) 2  Chills and Tingling fingers and Temperature symptoms (4 causes) 3  Chills and Tingling fingers and Body symptoms (3 causes) 4  Chills and Tingling fingers and Leg symptoms (3 causes)  Chills and Tingling fingers and Limb symptoms (3 causes)
From the geometry of the spherical mirror, note that the focal length is half the radius of curvature: As in the case of lenses, the cartesian sign convention is used here, and that is the origin of the negative sign above. The radius r for a concave mirror is a negative quantity (going left from the surface), and this gives a positive focal length, implying convergence.
How to use this tool. 1  Enter the distance to the object in the top field. 2  Enter the imager size of the camera. Enter 1/3 for the image size standard CS mount case camera. 3  Enter the focal length of the lens. Focal length is the rating of the lens.  Click the 'Calculate' button to see the horizontal (width) and the vertical (height) field of view.