The top typical digital SLR cameras, "lower" is the SD1, but the result of a sequence of thumbnail images taken with monochromatic light from 720nm to 380nm by 10nm between both. In a typical digital SLR, it is difficult to reproduce the neutral tones with little change in the color filter of RGB closed disproportionately color reproduction even with changes in wavelength. Also, are extremely low sensitivity in the red. "SD1" and that can lead to better capture the subtle gradation of color change in each wavelength range, the change in sensitivity with wavelength can hardly be seen. This difference and gradation of the sky color of the flowers such as morning and evening, a large difference appears in the reproduction of highly saturated colors of nature.