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随着科学技术的进步,制作彩色幻灯片越来越方便了,彩色幻灯片大有完全取代黑白幻灯片的趋势.然而,能够冲印制作彩色幻灯片的冲印店或电影制片厂不是每个城市都有,况且某些内容彩色幻灯片目前还不能取代黑白幻灯片,例如电镜和组织细胞培养等,国内多数仍是用黑白照片和幻灯片.由于黑白幻灯片的市场小,一般冲印店都不开展此项业务,而科研和学术交流又需要.因此,能自力更生制作黑白幻灯片就便利多了.制作黑白幻灯片的方法很多,根据工作经验,作者介绍一种用黑白正片翻拍(拷贝)的方法.1 操作步骤将观片灯箱(或X光片观片灯)平放在翻拍架座板上,将黑白底片(负片)夹在放大机的底片夹上,再将底片夹放在观片灯箱上,相机装上黑白正片胶卷安装在翻拍架上,镜头向下,与底片央相对.打开观片灯电源,此时光源从下面通过底片夹透射到底片上,上下移动相机,进一步调对焦距,使底片上的物像刚好充满取景框,使用光圈5.6,曝光时间1/4
With the progress of science and technology, it is more and more convenient to make color slideshow, and the color slideshow has completely replaced the black and white slideshow.However, the print shop or film studio that can make and print color slideshow is not every city Moreover, some of the contents of the color slide is not yet able to replace black and white slides, such as electron microscopy and tissue culture, the majority are still using black and white photos and slides.Because the black and white slides in the market is small, the general printing shop are not To carry out this business, and scientific research and academic exchanges are needed.Therefore, self-reliance to make black and white slides more convenient.Many ways to make black and white slides, based on work experience, the author introduced a black and white positive (remake) Method .1 steps will be viewing light box (or X-ray film watt light) flat on the flip stand board, the black and white film (negative film) clip in the amplifier negative film clip, and then the film clip on the film Light box, the camera is mounted on the black and white film installed in the rack on the flip, the lens down, and the film center relative to open the film lamp power, the light source from below through the film clip transmitted to the film, the upper and lower mobile phase Further tune the focus so that the image on the backsheet material just fills the viewfinder, using an aperture 5.6, exposure time 1/4