Weird prototype Sigma lens spotted at Photokina. Can you guess what it is? :)

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Weird prototype Sigma lens spotted at Photokina. Can you guess what it is? 🙂 – #nikonmirrorless #nikonfullframemirrorless #nikoncamera #nikonfullframecamera #nikongear #nikon #nikkor #mirrorlesscamera #mirrorlessgeeks #cameragear #camerageek #mirrorlessgeeks #nikonannouncement #camerasetup #nikonz #nikonz6 #nikonz7

A post shared by Nikon Z Mirrorless (@nikon_z_mirrorless) on Sep 25, 2018 at 12:13am PDT

Let’s see if someone knows what this Sigma lens actually is 🙂