Update: the lens is now officially announced.
A quick update from PhotoRumors that I think (if true) will be of huge interest for Nikon DX shooters: Sigma is rumored to announce a new 18-35mm f/1.8 DC HSM lens for APS-C based DSLR cameras (27-52.5mm equivalent). That’s right, a constant f/1.8 zoom lens! I initially did not believe this report, but the Czech website Fotoradce just published detailed specs of the upcoming lens:
