Sigma lens acronyms and abbreviations meaning.

Sigma lenses are a bit different in the way they print the aperture on it, if they use the fraction "F". For example : F2.8 (there is no “ / “ after the F).

The usual compatible camera brands with Sigma lenses are:

• Sigma.
• Canon.
• Nikon.
• Minolta/Sony.
• Pentax.
• Kodak (very few).
• Fujifilm.
• Olympus (few).
• Panasonic (very few).
• Leica (very few).

Sigma lens acronyms for the quality and purpose.

• A or Art: professional lenses, high end product, sophisticated optical performance.
• C: Contemporary (compactness and cheaper products).
• S: Sports (high quality zoom lenses).

The Main acronyms and abbreviations used by Sigma lens.

• HSM: Hyper-Sonic Motor.
• ASP: ASPherical element.
• APO: APOchromatic (low dispersion) element.
• OS: Optical Stabilizer.
• RF: Rear Focusing.
• IF: Inner Focusing.
• CONV: Teleconverter compatible (APO Teleconverter EX).
• EX: EXcellence (professional lenses, designation before 2012).
• DG: for full-frame camera(35mm).
• DC: for APS-C. cropped sensor camera.
• Macro: Focus very near to the subject, but not necessary at a 1:1 ratio.
• SLD: Special Low Dispersion (reduce the chromatic aberrations).
• ELD: Extraordinary Low Dispersion (has lower dispersion characteristics than SLD).
• FLD: "F" Low Dispersion glass in the highest level low dispersion glass available with extremely high light transmission, the F might meant to be comparable as the "Fluorite".
• DN: Mirrorless camera.

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