
Samyang AF 14mm F2.8 Canon EF
Canon EF, APS-C / DX, full size
Samyang AF 14mm F2.8 Canon EF
Canon EF, APS-C / DX, full size
AF stands for Auto Fucus while EF is the mount. According to Samyang the Mk IV is fully supported: https://www.samyanglens.com/en/product/product-view.php?seq=147
This is an autofocus lens with, of course, full electronic coupling with the camera. I would recommend checking the manufacturer's website. The fully manual lenses from Samyang, Laowa and some other manufacturers do not transfer Exif data. There are only a few expensive exceptions from Voigtländer and Zeiss.
A plug-in filter system must be used with the lens. The lens is top! A clear buy recommendation from my side.
Yes you can, but only with the EF adapter.
No, it doesn't look like it.