The “E.F.L.” in the lens E.F.L. 1.85mm is the abbreviation of “Effective Focal Length“, which means effective focal length, and “1.85mm” means that the focal length of the lens is 1.85 mm.

The meaning of focal length

Definition: In the field of photography and videography, the focal length of a lens refers to the distance from the center of the lens to the imaging surface, which determines factors such as the lens’s viewing angle, shooting distance, and imaging quality.

E.F.L. 2.8mm

Unit: The length of the focal length is usually expressed in millimeters (mm).

Features of 1.85mm focal length

Ultra-wide angle: The focal length of 1.85mm belongs to the ultra-wide angle category, which can capture a very wide field of view and is suitable for occasions where large scenes need to be shot or special visual effects need to be created.

Imaging characteristics: Ultra-wide-angle lenses often produce a certain degree of distortion, which can create unique visual effects when shooting landscapes, buildings, and other subjects, but may need to be used with caution when shooting subjects such as portraits that need to maintain true proportions.