在现在的数码相机时代,M42口单反镜头以其质优价廉、转接通用性好、转接环便宜等优点而备受影友们的喜爱。在镜头改口中,M42螺口似乎也成为了一种标准,在众多镜头的改口中,M42口在的数码相机时代,M42最为常见。M42螺口曾经被前民主德国、日本、前苏联等国家的众多厂家采用,其中又以前苏联的产量最大,且价廉物美,在我国市场上也较常见。下面笔者就结合自己的收藏体会,谈一下前苏 In the current era of digital cameras, M42 SLR lens with its high quality and cheap, adaptability, transfer ring cheap and other advantages and much shadow friends love. M42 screw seems to have become a standard in the lens to change the mouth, in many lens changes, M42 in the digital camera era, M42 is the most common. M42 screw used to be used by many manufacturers in countries such as former Democratic Germany, Japan and the former Soviet Union, among which the former Soviet Union had the largest output and the low price, which was also common in our country. The author will combine the following collection of my experience, talk about the former Soviet Union