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随着投影幕的尺寸越来越大,高端的影音发烧友都会注意到,当用16:9的投影幕观看2.35～2.40:1比例的电影时,屏幕上下方的黑边会显得非常大,对观看的负面影响是非常明显的。如果配合2.35:1的投影幕观看,用16:9的投影机直接投射后,会损失接近1/3的像素,非常浪费。于是,使用变形镜头搭配2.35:1宽荧幕就成为了最完善的解决方案之一。目前市场上的变形镜头主要有两种结构,一种是棱镜型,另一种是镜片组型。棱镜型镜头是通过一块或多块的棱镜组成的镜头,最大的优势是拥有非常大的光圈,能满足不同类型投影机的使用需求,亮度损失可以降到最低。而镜片组型镜头就是采用多块圆形透镜通过折射形成投射画面的变形,其突出的地方在于拥有优秀的成像质量,色彩鲜艳亮丽,但光圈相对较小,亮度损失较为明显。这里要介绍的Panamorph(潘拿摩)UH480就是棱镜型变形镜头中的代表作,除了亮度损失小之外,画质也保持在不俗的水平。
As the size of the projection screen becomes larger and larger, high-end audio and video enthusiasts will notice that when viewing a movie of 2.35-2.40: 1 ratio with a 16: 9 projection screen, the black border at the top and bottom of the screen will be very large. The negative impact of viewing is very clear. If with 2.35: 1 projection screen to watch, with 16: 9 projector direct projection, will lose nearly 1/3 of the pixel, very wasteful. As a result, the use of anamorphic lenses with a 2.35: 1 widescreen has become one of the most complete solutions. Currently on the market, there are two kinds of anamorphic lens structure, one is the prism type, the other is the lens type. Prism-type lens is through one or more pieces of prism lens, the biggest advantage is that with a very large aperture, to meet the different types of projectors needs, brightness loss can be reduced to a minimum. The lens group type lens is the use of multiple pieces of circular lens refraction to form a projection of the deformation, the highlight is that with excellent imaging quality, bright colors, but the aperture is relatively small, more obvious loss of brightness. Here to introduce the Panamorph (Panamao) UH480 prism is the masterpiece in the deformation of the lens, in addition to the brightness loss is small, the picture quality is also maintained decent.