Complex sentence: The Nikon AF-S 17-55mm f/2.8 G IF-ED DX was announce in 2004,Is a F-mount professional (gold ring) mid-range zoom lens with a constant fast aperture of f/2.8 designed for Nikon DX digital SLR cameras.
Split into simpler sentences: The Nikon AF-S 17-55mm f/2.8 G IF-ED DX was announced in 2004. It is a F-mount professional zoom lens with a constant fast aperture of f/2.8 designed for Nikon DX digital SLR cameras.