Samyang web site says: "Samyang's first Auto Focus Standard Zoom" so even they seem to think it's the first. I know Samyang used make AF zooms in the past for (D)SLRs, but for some reason they seem to have started the count from zero again.
it was a really good lens for the short time that I had it- was a bit heavy though- but I liked it a lot. image quality and lens performance were excellent... however, there are two really huge problems with it: first, is that the mounting plate is screwed into four small plastic posts- this is all that is holding your lens onto your camera. so let's say you trip and fall and you bang your lens on the ground (which I've done with my sony 28-70mm kit lens- but it still works perfectly), or if your tripod with your camera falls, as mine did, the plastic posts will simply break on impact and your lens will just snap straight off your camera. the second problem is trying to get that repaired. it will not go well because repair shops cannot get any parts for your lens, and Samyang has only one location in the US to fix the things covered by their warranty... so ultimately you'll learn that you've bought a $1000 disposable lens... a real shame because I would have easily replaced it with another. Instead, though I'm gonna miss the 4mm on the wide end, I got the Tamron.
Thanks for sharing. I have not seen how the Samyang is constructed, but I've seen another lens (not Samyang) break exactly the same way. Then the manufacturer's rep told me that it's designed like that to protect the camera's mount. So the camera body would not get damaged or bent. Of course, if you then can't get the lens fixed it's a big problem too. Maybe the rep also made up that explanation, who knows😀
Fraud!!!! Ignore this comment as the same has been posted on virtually ALL the reviews of the Samyang lens on RU-vid. There is a clear motive here and it is wrong!