 On March 6, 2007, Nikon introduced the D40X, a sister camera to the D40.While identical in external design to the D40, it has a 10.2-megapixel CCD sensor, continuous shooting up to 3 frames per second, and a base sensitivity of ISO 100 (as noted above, each pixel in the 10.2-megapixel sensor receives less light than the pixels in the D40 sensor).It has a flash sync speed of 1/200 seconds compared to the D40's 1/500 seconds.