What is the shooting angle of standard lens with focal length 18MM?

Based on 135 camera! The field of view of 18mm is 99 degrees, that of 28mm is 74 degrees, and the Canon conversion rate is 1.6.

Standard lens, the general term for lenses with a viewing angle of about 50 degrees.

A photographic lens with a focal length approximately equal to the diagonal length of the photographed picture. Its viewing angle is generally 45 ~ 50. 35mm lens with a focal length of 40-60mm, 6 * 6cm lens with a focal length of 75-80mm, and 4 * 5in lens with a focal length of 120- 150mm. A standard lens usually refers to a photographic lens with a focal length of 40 to 55 mm, and the perspective effect of the scene represented by the standard lens is close to vision. This is the most basic photographic lens.