Flashes with auto zoom

Automatic zoom

— the ability to automatically change the angle of scattering of light, which provides a flash. The optimal angle is considered to correspond to the angle of view of the lens mounted on the camera; accordingly, when using lenses with a variable focal length, the angle of light scattering should also change accordingly. The auto zoom function is designed primarily for such optics: it provides constant on-the-fly synchronization between the lens and the flash. Thanks to this, you can easily change the viewing angles without being distracted by the manual reconfiguration of the flash (which is not only time-consuming, but also rather troublesome).