The Eastern Kodak Company, largest manufacturer of photographic supplies and equipment in America, recently announced several additions to its lines. The new film, cameras and books should be of interest to professional and amateur alike.

One of the most exciting new offerings is a high-speed slide film called Ektachrome 400 (ASA 400). It's balanced for daylight, offers twice the speed of existing Kodak Ektachrome 200 film, and may be push-processed to ASA 800 with excellent results. The film uses process E-6, which makes it ideal for darkroom enthusiasts who enjoy developing their own. It's available in both 20- and 36-exposure 35-mm magazines and 120-size rolls. Suggested list: EL 120, $3.35; EL 135-20, $4.20; EL 135-36, $6.

Kodak's first instant camera with built-in electronic flash, called Colorburst 300, features a flash unit with its own lighten/darken control and power to illuminate subjects from three to 12 feet. The unit runs on four alkaline AA-size batteries and re-cycles in 10 seconds, providing more than a hundred flasher per battery set, according to Kodak. Nicad batteries may also be used. Suggested list: under $75.

Two new 110-size pocket cameras, both with built-in electronic flash and one with existing-light capability, round out Kodak's popular Ektra line of cartridge cameras. The Ektramax takes 110-size, 400 ASA film and has a fast shutter speed for action and a slower shutter speed and wide f/1.9 lens aperture for available-light photography. The lens, a newly designed, four-element lens invorporating one aspheric-shaped element, achieves improved quality at a high aperture with fewer lens elements, according to the manufacturer.

The Ektramax has a projected reticle viewfinder with parallax marks and five focusing symbols coupled to a newly designed focus wheel. Weather dial exposure settings appear in the viewfinder also. The camera's built-in flash recycles in two seconds and offers 200 flashes from two fresh AAA-size batteries. Flash range with 400 ASA film is four to 20 feet.

Kodak's second new cartridge camera, the Ektralite 10, requires no camera settings for daylight photography. The viewfinder features a projected frame with parallax correction marks.

The camera's built-in electronic flash recycles in 10 seconds and provides 100 flashes from two fresh AA-size batteries, according to Kodak. A blinking flash-ready light appears in the viewfinder and on the camera top. Flash range with 400 ASA film is five to 15 feet.

Suggested list price for the Ektramax is $87.50; for the Ektralite 10, under $38.

Professional and advanced amateurs will find the new Kodak publication Professional Photographic Illustration Techniques an invaluable guide. According to Kodak editor Frank N. McLaughlin, "A unique feaure of this book book is actual information compiled and written by photographers themselves. This makes information all the more valid since it represents many lighting techniques used by these photographic illustrators."

The tips by these leading commercial photographers, passed along from one apprentice to another and carefully guarded over the years, cover cameras, films, lenses and lights. The book features many illustrations and lighting diagrams that you can copy and adapt to your own needs.

In one section on basic lighting, such subjects as lighting ratio versus subject brilliance and preserving roundness in spherical objects are discussed. Other areas explored by the 43 illustrators represented in the book include preparing photographs for reproduction and working to a layout. It's an invaluable guide for someone who has gone beyond photo basics. Suggested list, $7.50.