| 摘要 |
A data-projection device for a camera which always projects both a data pattern and its background clearly without the need for a photometer or similar mechanism. This data-projection device includes a data-projection module positioned on the reverse side of a frame of photographic film housed in a camera body and a filter plate positioned between the film and the camera lens. In this filter plate, the light transmittance of central area corresponding to the path of the photographing light entering the data-projection area of the film is set so that the received light reduction rate of the photographing light falls within the range of 40% to 80% in this data-projection area. The photographing light passing through the central area is projected onto the photographic film in a sufficiently recognizable state, and at the same time, the data pattern is also always clearly projected because the brightness of the subject image which passes through the central area and is projected onto the photographic film appropriately diminishes.
|
