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2. Sigma SA-mount - Wikipedia

   en.wikipedia.org/wiki/Sigma_SA-mount

   Mechanically, the (inner) SA-mount is similar to the Pentax K-mount as well, [2] but with a flange focal distance of 44.00 mm, identical to that of the Canon EF-mount. Like the EF-mount, the SA-mount uses electrical communication between body and lens, and in fact uses the same signalling lines and protocol as the EF-mount, despite the physical ...

3. Canon EF lens mount - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_lens_mount

   Number of Canon EF lenses sold over time (red), compared with Nikon F mount lenses (blue) The EF mount replaces its predecessor, the FD mount.The standard autofocus lens mounting technology of the time used a motor in the camera body to drive the mechanics of the focus helicoid in the lens by using a transfer lever.

4. Sigma 150mm f/2.8 APO Macro EX DG HSM lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_150mm_f/2.8_APO...

   The Sigma 150mm f / 2.8 APO Macro EX DG HSM is a telephoto macro prime lenses made by Sigma Corporation. The lens was produced for the SA mount, Canon EF mount, Four Thirds System, and the Nikon F-mount; all have the same optical formula.

5. Sigma 35 mm f/1.4 DG HSM lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_35_mm_f/1.4_DG_HSM_lens

   The Sigma 35 mm f / 1.4 DG HSM Art is a wide-angle prime lens made by the Sigma Corporation. [1] The lens was announced at the 2012 photokina trade fair. [2]The lens is produced in Canon EF mount, Nikon F-mount, Pentax K mount, Sigma's own SA mount, and the Sony/Minolta AF Mount varieties, all have the same optical formula.

6. The best Canon telephoto lenses in 2022: for your DSLR or EOS ...

   www.aol.com/news/best-canon-telephoto-lenses...

   At around twice the price of the Sigma and Tamron 100-400mm lenses on the market, the Canon EF 100-400mm f/4.5-5.6L IS II USM is a more substantial proposition.

7. Canon EF-M lens mount - Wikipedia

   en.wikipedia.org/wiki/Canon_EF-M_lens_mount

   The Canon EF-M lens mount, introduced in 2012, is a derivative of the Canon EF lens mount designed for use with the Canon EOS M mirrorless interchangeable-lens camera. The EF-M lens mount is one of Canon's two new systems for mirrorless cameras, the other being the RF mount. The M system has an 18 mm flange focal distance (compared to 20 mm for ...