Essentially a D3 body with a higher-resolution sensor, the 24MP Nikon D3X offers the joint (with the Sony A900) highest pixel count of any current full-frame DSLR. Superficially, the new flagship is the D3's identical twin. The camera's core component, however, is brand new. The 36 x 23.9 mm CMOS sensor provides a resolution of 24.5 megapixels, and while this is - compared to the D3 - a massive jump in resolution, D3X users have to accept a smaller range of sensitivity (ISO 100 to 1600, extendable to ISO 50 to 6400) and slower continuous shooting of five frames per second (7 fps in DX mode) in return.