论文部分内容阅读
120胶卷(彩色、黑白)在通常情况下,只能拍摄8张(6×9cm新闻相机)、12张(6×6cm)、16张(6×4.5cm)。用普通相机拍半身头象效果不佳。如果将旋转背(即120万能后门,有售,也可自制)套在外拍机(6寸或8寸座机)上摄影,就可得到较为理想的照片。因为外拍机镜头焦距长、成象清晰、不易变形,同时可以降低成本(彩色卷价格昂贵)、提高工效、简便易行。其方法是:用一套规格齐全(2.8cm×3.8cm、3.8cm×6cm、6×8cm)的120旋转背,如
120 film (color, black and white) Under normal circumstances, can only shoot 8 (6 × 9cm news camera), 12 (6 × 6cm), 16 (6 × 4.5cm). Half-body with a normal camera as poor results. If you rotate the back (ie 120 million back door, available, can also be made) set in the filming machine (6-inch or 8-inch plane) photography, you can get a better picture. Because the film machine lens focal length, imaging clear, not easy to deformation, while reducing costs (color roll price expensive), improve work efficiency, simple and easy. The method is: with a complete set of specifications (2.8cm × 3.8cm, 3.8cm × 6cm, 6 × 8cm) 120 rotating back, such as