Sony SEL-1635Z Vario-Tessar FE F4 ZA OSS full-frame lens (16-35 mm) (Accessory)
Only I have around for days wondering whether I shoot with the Sony APS-C 10-18 mm to 12 mm without Gegenlichblende to full-frame (which, amazingly, comes), the Sigma 12-24 mm with A-Mount adapter (still mightier piston 700 EUR ) or with the Walimex