AlexisH: "On March 27, Samyang and Rokinon teased a new lens on the Samyang Facebook page"
I don't see any mention of Rokinon on that page. Why would Rokinon even be involved in the announcement of a Samyang lens? They're just rebranding Samyang lenses, they don't have anything to do with their design or manufacture.
Any solid proof, e.g. ownership of one by the other or trademarks ownership by just one one of them?
Not really. Samyang Optics is a Korean manufacturer, Rokinon and Bower are trademarks held by US based distributors of Samyang, amongst lens and accessory lines made by others.
BillGarrett: Interesting new lens. IQ would need to be amazing, though, for me to give up my Sigma 10-20mm AF zoom.
Just compare the Sigma 10-20 to the Samyang 14/2.8 & 16/2.0 and this one is supposed to be even better.
AcerAntec: Grmf... 'Hope the Wizards at Magic Lantern's will increment this in their next release, to make Dual pixel, continuous focusing available for my 5D MkII. Et voilà.
ML is not a company but rather an Open Source / community effort
Kurnia Lim: Can I use T-stop lens for just photo not video?
Joe Ogiba: Sony Professional Cameras S35 ? Is that the E mount ?
S35 is a sensor / film frame size, a bit larger than APS-C variants and unrelated to lens mount.
sportyaccordy: You know, on the outset these sound like great lenses, and I'm sure they are. But I think I will pass. The 16 2.0 for example sounds FAST. But on APS-C it's equivalent to 24 3.2 35mm. Meanwhile, I can get a Lens Turbo and an old 24 2.8, which would translate to a 16 1.8, for less money. A lowly 50 1.8 becomes a 33 1.2. Etc. etc. Plus I would be getting 2 lenses in 1 with each lens. Not saying these lenses are worthless or that the speed booster combos would be a match in IQ, but for me right now, ehhh. I mean a 24 2.0 an 50 1.4-1.8 would cover the span of a standard zoom with max apertures reaching 1.0 depending on the combo. Plus it's all MF anyway.
An old old 24 2.8 + a focal reducer (yet another glass element) will be inferior to a top echelon modern 16mm F2.0 lens, especially wide open and for off center qualities.
D1N0: of course it is only t3.3/4.4 equivalent ;)
And I bet your comment is based upon thorough light transmission testing vs other F2.0 / T 2.2 lenses :)
Digital Suicide: 90% shots it will be set to infinity. So MF shouldn't a problem.
It's way better to set the distance at 1-3m rather than infinity as with whatever F number other than fully open you'll get DoF reaching infinity anyway.
Chop lens and AF, add a popular lens mount (*), peaking feature and and HDMI connector for an external display and it'll sell nicely as a specialized sensor + mount body for demanding pros and enthusiasts.
* Ideally one of the short flange distance mirrorless mounts, 2nd best EOS mount.