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这两只镜头的焦长相当于35mm相机的15-33mm镜头和15-30mm镜头。35mm相机的15mm定焦镜头曾经让我们等待了很长的时间。甚至在今天,15mm镜头仍被认为是极端的、特别的。然而,对于数字变焦镜头来说,10mm或12mm焦长已屡见不鲜。数字镜头,特别是数字广角镜头的设计应该比相似规格的35mm相机镜头的设计面临更多的难题,但现在有大量的新材料和新新技术应用在镜头的设计上。它们还可以降低镜头的成本。
The focal length of these two lenses is equivalent to 15-33mm lens and 15-30mm lens of 35mm camera. The 35mm camera’s 15mm fixed focus lens once made us wait for a long time. Even today, 15mm lenses are still considered extreme and special. However, 10mm or 12mm focal lengths are not uncommon for digital zoom lenses. Digital lenses, and especially digital wide-angle lenses, should be designed with more challenges than similar 35mm camera lenses, but there are plenty of new materials and new technologies for lens design. They also reduce the cost of the lens.