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Meaning of Codes on Sigma Lenses

Posted by oneslidephotogaraphy On April - 27 - 2018

Sigma Lens Codes

Sigma Lens Codes




Each lens are made in accordance with the features and functions that it has. And the following are codes on Sigma lenses and the meaning to each one.


EX – EX Lenses are premium lenses in the Sigma lens product line, like the L Series of Canon lenses. It’s no surprise that EX coded lenses are usually relatively expensive.


DC – DC Lenses are lenses designed specifically for cameras with a (APSC). If your camera is a camera with a full-frame sensor, this lens is not for you.


DG – DG lenses are Sigma lenses designed for both the full-frame and cropped sensors.


OS – OS is short for Optical Stabilizer (equivalent to the IS or VR). It functions to lessen tremors when photographing in low shutter speeds or when photographing with a telephoto lens.


HSM – Hyper Sonic Motor uses a quieter motor technology (silent focusing) and has a better focusing speed.


Sigma 50mm f1.4 EX DG HSM

Sigma 50mm f1.4 EX DG HSM




ELD – Extra Low Dispersion. Lenses with this code uses special optics that minimizes chromatic aberration, flare, and ghosting.


SLD – Special Low Dispersion. It’s almost the same as ELD but of a higher class/quality, making it more expensive.


FLD – Fluorite Low Dispersion. These uses a low-dispersion element that containing fluorite.


APO – Apochromatic lenses. APO lenses are designed to minimize chromatic aberration (purple fringing).


ASP – Aspherical lenses; it has a complex element design to fix photo quality in general and lessens the size and weight of the lens.


IF – Inner focusing lenses focuses by moving internal elements rather than frontal elements. This means that when this lens focuses, the frontal elements doesn’t rotate along (very useful when using a CPL Filter). Also, IF lens bodies do not change (doesn’t get elongated or shortened) when focusing.


RF – Rear Focusing lenses focus by moving the rear elements.


CNV – These lenses can be coupled with a teleconverter.


S p o n s o r e d L i n k s





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