This camera, produced by the company Polaroid, revolutionized the amateur photographer's market, which was decades behind. This remarkable technology produces film-based black-and-white or color "instantaneous" photographs. Unfortunately, basic one-shot cameras don't offer satisfactory imaging control for really serious work. For professionals, the most common use of a primary imaging camera is to take "trial" shots of lighting effects in a studio. For this use, special "primary camera backs" can also be used that are mounted on larger cameras such as Hasselblad or back view cameras.
In 1994, the American Polaroid Company launched a new fully automatic single-lens reflex instant camera called Captiva, which is characterized by the fact that the exposed film is not automatically ejected from the top after development, but slid to the back of the camera for storage. Inside the cassette, you can enjoy instant viewing through a transparent window, eliminating the burden of holding photos. A total of 10 photos can be stored in the magazine, and the viewing window can be opened to take out photos at any time.
One-shot camera featuresThe Captiva camera has the flexibility of horizontal and vertical framing, and the picture can be designed more ideally. Its focus, exposure, flash, shutter opening, etc. are automatically adjusted according to the target distance and brightness, so it is as convenient to use as a point-and-shoot camera.
The English name of an imaging camera is Polaroid, which is often translated as "Pola", "Laride" or "Polaroid" in China. There are many imaging principles for Pola film, and the film that is mainly sold in my country is imaged by diffusion transfer method. The sheet of this film has a photosensitive emulsion and a dye layer. After exposure, the negative film and the positive film are superimposed and pulled out from between a pair of rollers in the camera. The rollers squeeze the medicine bag and coat the slurry between the negative and positive films. , Emulsion development at the exposed place, and the dye or silver halide at the unexposed place is transferred to the receiving layer of the positive film through the diffusion of the paste for imaging. After about 1min (minutes), the positive and negative films are separated, and the positive image with the scene is obtained on the positive film, and the opaque negative film is thrown away.
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