| 摘要 |
<p>A graphic arts camera has a copyholder (22), a lens carriage (16) which can be raised an lowered by steel bands (30, 36) to alter the magnification, and a film-holder carriage (14) which is raised and lowered simultaneously to provide automatic focussing, by means of a crank (24) and connecting rod (26). By these means the camera can be adjusted between 300% and 33% magnification, and in the 100% magnification position the film-holder carriage (14) is in its lowest, most convenient position.</p> |
