1635mm

In early November, Panasonic announced that they would be releasing a 16-35mm f/4. Ever since Panasonic released the S1 and S1R, people have been asking about a wide angle lens, especially with the availability of a high-res mode in both cameras (96MP in the S1, 187MP in the S1R) making them a great camera for landscape shooters.

Canon's original 16-35mm f/2.8L was released in 2001, and the followup Mark II version arrived in 2007. Now, 9 years later, a Mark III refresh is reportedly just around the corner.