Good question, so far we are seeing manufacturers kit / combine the lenses with their cameras. And from what manufacturers have told us, they believe that having a 'real 4K' lens (and not just a 'regular' 1080p / 3MP one) makes a difference in image quality.
As for what 4K certified / specified lens are out there, I don't know. Ethan? Members?
I have yet to see a C/CS mount 4K lens from any of the usual lens manufacturers (Tamron, Computar, Fuji, etc.). Even a quick Google search didn't turn up much. We briefly spoke to a couple of manufacturers at ISC about this, and they all pretty much said, "They're coming."
So I'm not sure what OEM sources manufacturers are pulling from, but I can't find them, and they don't seem to be the usual suspects as of yet.
I’d be interested to hear how a 4K lens will improve performance. If the FOV is widened because the 4K imager can sustain the spatial resolution over a greater area, then I can see that distortion must be kept in check. Is the lens makers’ argument that 4K’s higher resolution is better able to resolve the imperfections introduced by a particular lens? It seems this would be a subtle effect, maybe not as important to manual viewing as it would be to analytics.
IPVMU Certified | 01/08/15 07:16pm
Lilin is specifying two Fuji lenses for their 4K cameras:
A fixed one: YF2.4SR48, 2.4mm, and this vari-focal, the DV2.2×4.1SR4A, 4.1mm-9mm
Though curiously rated for 'only' 6 MP.
So it may be best to wait and standby until a 4k lens is on market, as we may not get all of the camera's performance, huh?
IPVMU Certified | 02/02/15 09:51pm
Toshiba recently came out with a 4K SDI (machine vision?) camera, which takes C-mount lenes. They list a bunch of compatible lenses in the accessories section like this Fuji machine vision one.
IPVMU Certified | 03/17/15 10:42am
Dahua have announced a 10MP 4K lens and a 6MP 4K lens. Both are CS mount.
Thanks for that, Luke. The 6MP is a Fuji lens, same as one of Lilin's recommendations above.
The 10MP is an Evetar lens. Though how one is supposed to know it's 10MP based on the specs, I'll never know.