Technical Information

For technical information in the United States, call the Kodak Information Center (KIC), 9:00 a.m. to 7:00 p.m. (Eastern time), Monday through Friday, at 1 (800) 242-2424. In Canada, call 1 (800) 465-6325, Monday through Friday, from 8:30 a.m. to 5:00 p.m. (Eastern time). Outside the United States and Canada, contact Kodak or a distributor in your country.

A Note on T-Stops and F-Stops

When discussing lens aperture size, cinematographers tradi- tionally refer to t-stops while still photographers refer to f-stops. A t-stop is a measure of actual light transmission by the lens. An f-stop is the theoretical ratio of the lens’ focal length to the diameter of its entrance pupil (approximately the aperture diaphragm size in a symmetrical lens). What relates the two is the lens’ efficiency in transmitting light; if the lens could transmit all the light entering it, its t-stop and f-stop would be the same (ANSI PH 22.90-1987,Aperture Calibration of Motion Picture Lenses, Method for Deter- mining, gives full details).

Color Temperature

The color quality of some light sources can be stated in terms of color temperature, and is a measure that defines the color of a light source relative to the visual appearance and expressed in degrees Kelvin (K). There are at least two important points to keep in mind when using color temper- ature values. First, color temperature refers only to the visual appearance of a light source and does not neces- sarily describe its photographic effect. Second, color temperature does not take into account the spectral distri- bution of a light source. Unless the light source has a continuous spectral distribution, its effective color temper- ature alone may not be reliable as a means of selecting a suitable correction filter. For example, fluorescent lamps do not have the continuous smooth spectral-distribution curve that is characteristic of a tungsten-filament source.

It is possible for two or more light sources to be described as having the same color temperature, but the photographic results obtained with each may be quite different. Only a

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Kodak, a name synonymous with photography, has undergone a tremendous evolution over its long history. The company is not just a pioneer in film and printing technologies but has also embraced the digital age with significant innovations.

One of the prominent features of Kodak’s evolution is its dedication to imaging science, which has remained at the core of its business strategy. Kodak has developed a wide range of film types, including color negative film, color positive film, and black-and-white film, which cater to different photography needs. Each film type comes with unique characteristics designed to optimize image quality, color reproduction, and contrast.

Kodak’s commitment to innovation is evident in its development of digital technologies. The company was an early adopter of digital imaging techniques, launching its first digital camera in the early 1990s. This transition to digital photography focused on making the process more accessible for consumers while maintaining the quality and detail that Kodak is known for. The use of image sensors, such as CCD and CMOS, has allowed Kodak to capture high-resolution images that are rich in detail and color fidelity.

One of the standout technologies associated with Kodak is its printing technology, particularly the dye-sublimation printers. This technique produces high-quality prints by transferring dye onto materials like paper or plastic. Kodak’s printers are known for their rapid print speeds and excellent color reproduction, making them popular for both personal and professional use.

Additionally, Kodak has also made significant strides in the realm of image editing software and applications, which complement its hardware offerings. Programs like Kodak EasyShare and Kodak Gallery have allowed users to edit, organize, and share their photos seamlessly, further enhancing the user experience.

Another important characteristic of Kodak is its steadfast commitment to sustainability. The company has initiated various programs aimed at reducing environmental impact by promoting recycling and energy-efficient practices in its manufacturing processes.

In summary, Kodak’s legacy is a blend of heritage and innovation. From traditional film to cutting-edge digital imaging and sustainable practices, Kodak continues to hold a prominent place in the world of photography. Its technologies and products are a testament to its ability to adapt to changing times while remaining grounded in its core values of quality and consumer accessibility.
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