Designations Alphabet Characters On Canon Lenses

Let's see what all these letters and numbers mean on lenses. This will help in the future when choosing new lenses.

L - informs us about the accessories of the lens to the line of professional lenses Canon Luxury. Such lenses necessarily exist in the arsenal of professional wedding and family photographers.

EF - tells us about the way the lens is attached to the camera or bayonet, as professionals say.

EF-S is another kind of bayonet. Usually, this type of attachment occurs in cameras that have an incomplete frame matrix (kropnutyu) - amateur mirror or semi-professional camera line canon. EF-S lenses are not suitable for EF bayonet cameras.

USM (Utlrasonic Motor) - indicates that an ultrasonic focusing drive (motor) is built into the lens. Such lenses work noiselessly, and have increased speed and accuracy of focusing. Help the wedding and family photographer to quickly catch and focus on the subject of photography, whether it be a throwing bouquet of a bride or a playing child.

IS (Image Stabilizer) - the lens is equipped with an optical image stabilization system . Allows to remove from hands on longer exposures. But do not strongly rely on this function, and if necessary, it is better to use a tripod.

DO (Diffractive Optical Elements) - the optical design of the lens uses diffractive optical elements. Due to this, the mass and dimensions of the lens are reduced, without losing the quality of the optics.

(Tilt-Shift) - special lenses with the possibility of correction of perspective due to the slopes and shifts of the optical node.

FT-M - Full Time Manual - Lenses with permanent manual focus.

I / R - Internal Focus Rear Focus - lenses with internal focusing or focusing by the rear group of lenses (with non-rotating front lens)

S-UD - says that the lens of the lens is made of S-UD glass

AL - Aspheric lenses

CA (Circular Aperture) is a circular diaphragm.