Question: what are nikon dx lenses?
Answer: DX-NIKKOR lenses are engineered and optimized for use on Nikon DX-format D-SLRs and are designed to cover the smaller image area of the DX sensor. When a DX lens is mounted on an FX-format Nikon D-SLR, the camera's DX-Crop Mode is automatically engaged, introducing a 1.5x magnification (cropping) factor.