41. The perspective is the same for both formats, but because of the different angles of view , the pictures are not the same. 42. Because this is a trigonometric function, the angle of view does not vary quite linearly with the reciprocal of the focal length. 43. Pfund s instrument, allowed the angle of measurement to be varied, but maintained the angle of view to the angle of illumination. 44. Therefore, by means of images made from other angles of view , it is possible to calculate the camera location using this point relation. 45. The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular sensor. 46. The high reproduction ratio and wide angle of view allow capturing high quality images not only of a subject but also the surrounding scenery. 47. This leads to the interesting phenomenon of the same EF lens providing different angles of view depending on which camera it is mounted on. 48. It is difficult to photograph the complete semicircle of a rainbow in one frame, as this would require an angle of view of 84? 49. It can be used with Nikon DX format cameras with the angle of view reduced to 61?( equivalent to a 36mm lens ). 50. When used on DX format cameras the resulting angle of view along with its large aperture also make it a lens suitable for portraiture.
