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2. Sigma 50mm f/1.4 DG HSM A lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_50mm_f/1.4_DG_HSM_A_lens

   The Sigma 50mm f/1.4 DG HSM Art lens is a professional-level fixed focal length camera lens made by Sigma Corporation. [1] It was announced at CES in January 2014 and immediately became highly anticipated amid reports that Sigma was not aiming to compete against Canon or Nikon's 50mm prime lenses but rather the newly released Zeiss Otus 55/1.4, a lens costing US$4,000. [2]

3. Sigma 50mm f/1.4 EX DG HSM lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_50mm_f/1.4_EX_DG_HSM...

   The Sigma 50mm f / 1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation. The lens is produced in Canon EF mount , Four Thirds System , Nikon F-mount , Pentax K mount , Sigma's own SA mount , and the Sony/Minolta AF Mount varieties, all have the same optical formula.

4. Sigma 50-500mm f/4-6.3 DG lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_50-500mm_f/4-6.3_DG_lens

   The Sigma 50-500mm f / 4-6.3 EX DG HSM is a super-telephoto zoom lens produced by Sigma Corporation. It contains four SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration. It is aimed at advanced consumers.

5. Sigma 60-600mm f/4.5-6.3 DG OS HSM lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_60-600mm_f/4.5-6.3...

   The Sigma 60-600mm f / 4.5-6.3 DG lens is a super-telephoto zoom lens produced by Sigma Corporation since 2018. It succeeds an earlier 10× zoom lens (50–500mm) which was introduced by Sigma in 2000 and is commonly known as the "Bigma". It is aimed at advanced consumers.

6. Sigma 30mm f/1.4 EX DC HSM lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_30mm_f/1.4_EX_DC_HSM...

   Sigma 30mm f/1.4 EX DC HSM mounted on a Canon EOS 40D, hood attached. The Sigma 30mm f / 1.4 EX DC HSM is a wide-aperture photographic lens made by the Sigma Corporation , equipped with a Hyper Sonic Motor (abbreviated HSM, Sigma's trade name for photo lens focusing technology using ultrasonic motor ).

7. List of Nikon F-mount lenses with integrated autofocus motor

   en.wikipedia.org/wiki/List_of_Nikon_F-mount...

   The sequence of lens designations may differ in literature. See also full list of Nikon designations, Sigma designations, Tamron designations and Tokina designations.. Nikon AF-S/Sigma HSM/Tamron USD or PZD: The lens contains an integrated ultrasonic focus motor based on piezoelectricity, which enables quiet or low noise autofocus operation.