Film base
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Film base.
Flexible support on which light sensitive emulsion is coated.
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film base
the transparent support material for the emulsion or gelatin coat.
film emulsion
the light sensitive layer of the film which is coated onto the film base and which, on exposure and developing, forms the photographic image.
A film base is a transparent substrate which acts as a support medium for the photosensitive emulsion that lies atop it.
The film base is polyester, which has replaced glass and celluloid. Polyester is flexible but very dimensionally stable (menaing it doesn't expand or contract much with moisture and temperature changes).
First, the film base seems to be about 1 stop darker than that of Kodak's T400CN, the professional C-41 b-w film. It has a much redder cast than TCN, which has the brown we're used to seeing on color negatives.
If you're using a film based camera, color negative ISO 400 or 800 film is a good choice, or, since your subject is primarily black-and-white, 400 speed black-and-white film will be fine as well.
MAKING TRANSPARENCIES FROM COLOR NEGATIVES You can make brilliant color transparencies from color negatives as easily as you made color reflection prints by using color printing materials on a transparent film base.
The film base is usually plastic such as tri-acetate or polyester which is coated with a light sensitive emulsion. The emulsion consists of gelatin containing light sensitive silver halide crystals such as silver bromide and silver chloride.
Some magazines use film based images of test charts and measure resolution by eye. Some use more sophisticated testings methods involving the imaging of narrow slits and from that data calculate properties like MTF.
I choose a film based on my needs. I use Fujichrome Provia 100 for night shots, for example, and Kodak Ektachrome 100VS for day work.
It is caused by light passing straight through the emulsion and being reflected back by the film base on the light sensitive layer. This records slightly out of register with the original image.
Tamron is optically altering its thriving 35mm-film based lens line to make it 100% compatible with the needs of digital imaging. Other products such as lenses for projectors, CCTV and mobile phones also doing well.
Halation A phenomenon that arises when light scattered within the film emulsion continues through the film base and is reflected. Halftone A reproduction of an image through a special screen.
Transparency (slide). A positive image on a clear film base viewed by passing light through from behind with a projector or light box. Usually in color.
Tripod. A three-legged support for the camera.
Integral tri pack
The three emulsions, usually of different character, coated on the same film base. The system is used mainly on colour materials and also on some special purpose black & white materials.
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Gelatin-base films-All films are gelatin based. Gelatin is used to bind the emulsion to the plastic film base. This technology has been available for more than a century.
Films of this type that are designed to make negatives which are then used to make prints are relatively low- contrast and have an orange film base.
A diffused ring of light typically formed around small brilliant highlight areas in the subject. It is caused by light passing straight through the emulsion and being reflected back by the film base on the light sensitive layer.
If you’re still film based, bracket if possible. If not, you’ll need to adjust your exposure based on how much white is influencing the exposure and also how much sun is playing upon the white subject.
These colour casts can be corrected using filters on a film based camera, and digital cameras have a white balance setting to make the pictures look like the view our eyes see.
7mp DSLR have changed the way I look at digital camera capabilities. After 2 years of comparing DSLR camera images against scanned 35mm and 4X5 film, I decided to go with a pure digital workflow. I no longer own any film based cameras.
is equivalent to 35mm film, 20 megapixels is equivalent to 120 film, 108 megapixels is equivalent to 4x5 film. It is difficult to see a difference between a photograph made with a 5 megapixal digital camera and one made with a 35mm film based camera.
I have also found that larger film formats encourage compositions with more detail and complexity then using smaller digital and 35 mm film based cameras.
 See also: Film, Photograph, Image, Light, Photography
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