| 摘要 |
The present invention relates to a device designed to enable one to make a series of photographic test prints of the same image or the same portion of an image on a single piece of photographic paper so that the test prints may be compared with one another to decide which combination of parameters will be used in the developing process. The parameters which may be selectively altered include density, color balance, lens aperture, filtration and length of exposure, among others. The invention utilizes a fixed base and a turntable and includes structure allowing the photographic paper to be rotated with respect to a fixed aperture fixedly aligned with the image of the negative or slide which is to be reproduced. Successive rotations of the photographic paper with respect to the aperture wherein changes in the above described parameters have been made before each exposure will result in a single piece of photographic paper having developed thereon the same portion of a photograph developed utilizing differing parameters. In this way, the optimum parameters for development may be determined.
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