在广州摄影器材市场，佳能EF 85mm F1.4 L IS USM镜头的评测结果由DxOMark公布。这款镜头于2017年推出，是EOS单反系列中的一款高速人像镜头。它是EOS R无反系统采用RF系列前发布的最后一批EF定焦镜头之一，以L级系列为导向的镜头外观饰面有所翻新，此外还包含了一些高级特性，包括4级防抖和镜筒减震耐用设计。

这款镜头有一个复杂的光学结构，是为高分辨率成像设计的。采用了10组14片的规格。不过请记住，其中3片组成了光学防抖。与当前竞品一样，这款镜头采用了大量的高折射率玻璃和异常色散玻璃元件来防止轴向色差，还采用了一枚大直径玻璃模铸非球面镜片来提升无边框对比，尤其是较大光圈下的对比。此外，它还有一枚抗反射ASC(空气球)镀膜mirror片，以减少耀斑和鬼影，而前后mirror片都有氟涂层，以防止干后痕迹被雨水损坏，并在清洗时帮助去除指纹污渍。

自动对焦由环形马达（USM）驱动完成。USM可将小型化的内部组件移动到light circle前。这也支持佳能实现全时手动对焦功能，以及支持全像素双核CMOS AF兼容性mirror head。这款mirror head尺寸为88.6 x 105.4 mm (3.5 x 4.1”),重950克(33.5 oz)。整体相对轻巧紧凑，适合专业人士和狂热的业余爱好者使用。

主要性能参数：

镜head size: 10 groups, 14 elements

使用glass mold aspherical lens element

Supports optical stabilization

Fluorine coating and ASC anti-reflection coating on both sides of the mirror plate

Ring-type USM motor for fast and quiet autofocus

Dust and moisture resistant construction with a filter diameter of 77mm

The EF85mm f/1.4L IS USM was tested on a Canon EOS 5DS R camera, which has a resolution of approximately 50 megapixels, making it one of the highest-resolution DSLRs available at the time of testing.

On the Canon EOS 5DS R, this lens produced very high image quality with excellent contrast and color accuracy across the entire frame even at its widest aperture setting (f/1.4). The lens's bokeh is also very pleasing to look at.

Compared to other lenses in its class, such as the Sigma Art series or Zeiss Otus lenses, this lens holds its own well in terms of image quality but may not be quite as sharp in some areas when compared to these more expensive lenses.

In summary, while there are some minor differences between different versions of this lens depending on your budget and preferences for certain aspects like distortion correction or sharpness performance near edges where most photographers tend not to focus anyway; overall speaking – all three models offer exceptional value given their price points especially considering they can produce stunning results without needing an additional adapter!