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病虫的摄影经常要使用近距摄影技术,这是因为普通摄影一般从无限远到最近距离时,物像之比只能达到10:1,也就是说,用135相机拍摄时最小拍摄范围为10倍底片尺寸,即360mm×240mm 的范围,但是病斑和昆虫往往比较小,在这个范围就无法看清病斑和昆虫的斑纹特征,因此,病虫近距摄影是植病、昆虫科学必不可少的科研、教学和推广的手段。近距摄影一般是指物像比为10:1～1:20之间的摄影。根据物像比的变化,又分近距、超
Pest photography often uses close-up photography because the average ratio of portrait to portrait is only 10: 1 for normal photography from infinity to the nearest distance, which means that the minimum shooting range when shooting with a 135 camera is 10 times the size of the film, that is, the range of 360mm × 240mm, but lesions and insects are often relatively small, in this area can not see the spots and insects zebra pattern, therefore, pest and disease close-up photography is plant disease, insect science Indispensable means of research, teaching and promotion. Close-up photography generally refers to the aspect ratio of 10: 1 ~ 1:20 photography. According to the change of object ratio, and sub-close, super