The period for the development, normally three and a half years, was greatly shortened by the close collaboration among the design, engineering and manufacturing departments. The T90 took only two years to be marketed. It proclaimed its primary purpose, "human-friendly tool," an extension of the human eye and the human hand, with the smooth curved surfaces and unprecedented multifunctionality. Such functions include the power saving design of the build-in motor drive which can shoot up to 4.5 frames per second (fps) with four AA batteries, and three exposure metering modes. The T90 was able to wipe out the design concept that had been firmly established in conventional cameras, and triggered the bio-design boom in cameras that followed. The first T90 was proudly presented to Colani engraved "L. COLANI.” Features of the Design The first T90, present to Colani by Canon •  Streamlined bio-form with extensive use of curved surfaces. •  Expression of a relaxed and dignified feeling based on the low contrast produced by two semi-gloss black coatings which have different feel. •  Seamless, smooth curved surfaces that fit into the palm snuggly. •  Improved handling by the curved surface thumb rest on the back cover. •  Careful consideration for the shape of the shutter button surround tailored to the fingers. •  Optimal layout of the operational section in accordance with the frequency of use and importance.