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2. Sigma 24mm F1.4 DG HSM Art - Wikipedia

   en.wikipedia.org/wiki/Sigma_24mm_F1.4_DG_HSM_Art

   The Sigma 24mm F1.4 DG HSM Art is an interchangeable wide angle lens for full frame cameras. It was announced by Sigma Corporation on February 10, 2015. A full two stops faster than most 24mm primes, it is designed to capture wide angle imagery with shallow depth of field, as one might with a medium or large format camera.

3. 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.

4. Sigma 24mm f/1.8 EX DG lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_24mm_f/1.8_EX_DG_lens

   The Sigma 24mm f/1.8 EX DG is wide-angle lens which features a fast f/1.8 maximum aperture for use in low-light situations, and macro focusing capability to a reproduction ratio of 1:2.7. It uses aspherical lens elements.

5. Sigma 12-24mm f/4.5-5.6 lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_12-24mm_f/4.5-5.6_lens

   It has since been surpassed by the Canon EF 11-24mm f/4L zoom lens and the Irix 11mm f/4, a manual focus prime lens. [2] The Sigma 12-24 has low distortion even compared to less wide zooms like the Canon EF 16-35mm lens. [3] This lens is available in Canon, Nikon, and Sigma, Pentax, and Sony mounts.

6. Sigma Corporation - Wikipedia

   en.wikipedia.org/wiki/Sigma_Corporation

   Sigma 200–500mm F2.8 EX DG displayed at the 2008 photokina. ASP — Aspherical lens elements; APO — Apochromatic lens element(s), originally for "Advanced Performance Optics", not necessarily apochromatic; OS — In-lens "Optical Stabilization", analogous to Nikon VR or Canon IS

7. Nikon AF-S Nikkor 24-120mm f/4G ED VR - Wikipedia

   en.wikipedia.org/wiki/Nikon_AF-S_Nikkor_24-120mm...

   24-120mm focal length; Compact silent wave autofocus motor with full-time manual override; Nikon F-lens mount for use with Nikon FX format DSLRs; Rear-focussing elements allow for a non-rotating lens front, enabling easier usage of rotating filters such as circular polarisers