Opticallimits

In fact it was published as a classified ad on yahoo, the seller was asking little money, so it seems more like a stolen or found item.
So most likely it was a real prototype unless it was all set up by Sony which seems unlikely

https://petapixel.com/2019/06/01/it-look...type-lens/

Those zoom and focus rings do look fake though. As if printed via a 3D printer.

Prolly an early prototype anyway, or even just a physical mockup.

You can buy it, if you like: https://www.dpreview.com/news/3911050659...on-website

(06-05-2019, 03:40 PM)JJ_SO Wrote: [ -> ]You can buy it, if you like: https://www.dpreview.com/news/3911050659...on-website

 Looks like this was some birding Sigma engineer who woke up to find just the bayonet on his camera and a large lump on the back of his head .......

No, I think, Sony wants to make a bit extra money for their R&D. Prototypes are not cheap

If it's hollow inside, it could make a good "techno" looking flower vase.

SONY 200-600 along with Sony 600mmf4 are almost official now, so no it is not fake