The non-weather-sealed version of the lens is imminent.
The third-party lensmaker's new supertelephoto won't cost much more than an earlier 200-500mm model with no image stabilization.
When it ships, the new lens will offer long-range sports and wildlife shooters some new competition, but it's not as fast a supertele as some rivals.
Though its shooting features are essentially unchanged from the second-gen version, the RX10 now has far more zoom power with a 24-600mm lens.
The new advanced (not-so) compact pairs its 1-inch Exmor RS stacked CMOS sensor with an unparalleled f2.4-4 24-600mm lens.
Not to be left behind in the supertelephoto zoom department, Sigma literally one-ups one of its main rivals with the announcement of two different 150-600mm zoom designs.
A built-in 1.4x extender pushes Canon's forthcoming 200-400mm zoom to a maximum of 560mm. Also: higher prices but lower weights for new 500mm and 600mm supertelephotos.
The Japanese SLR powerhouse plans to endow its 300mm and 400mm telephotos with preset points with motorized focusing. Also: expect lighter 500mm and 600mm superteles.