By George Schaub:   "The days when ultra-wide-angle lenses for APS-C (what Nikon calls DX format) digital cameras were rare or not very good are over. We have seen new options from independent and camera maker manufacturers alike, each bringing the fun and creative options of these unique angles of view to ever more affordable price ranges. The latest for Nikon in this genre is the Zoom-Nikkor 10-24mm lens ($900 MSRP), equivalent to (in 35mm format) a 15-36mm zoom for Nikon DX-format cameras given their 1.5x coverage magnification. Being a DX-type lens it can be used on Nikon’s (so-called full frame) FX cameras in DX Crop mode, yielding the earlier-mentioned range."   Link