The EF 17–40 f/4.0L USM, an already elderly model, has one saving grace – a good price for an L-series instrument- but its optical properties could be hardly called outstanding. A lot was expected after the launch of the EF 16–35 mm f/2.8L II USM in 2007 but, in my humble opinion, it was a flop, one of the most overestimated lenses in the
Ein Canon 35mm/1,4L II USM bietet noch mehr zentrale Schärfe bei Offenblende und insgesamt auch etwas mehr Randschärfe. Dafür fehlt ihm der Bildstabilisator, es ist deutlich schwerer (805gr) und ab ca. 1.700 EUR auch wesentlich teurer. Der AF war an unserer 5Ds nicht sicherer als am Canon 35mm/2 IS USM. Specs for the Canon 35mm f1.4 L II taken Maximum: f/1.4 Minimum: f/22: Camera Mount Type: Canon EF: Format Compatibility: 35mm Film / Full-Frame Digital Sensor To present even lighting and EF 16-35mm f/2.8L II USM; EF 16-35mm f/2.8L III USM by learning the fundamentals and advanced techniques from expert Canon instructors. and test drive
The original Canon EF 85mm f/1.8 remains as a superb lens for everything at a bargain price with magnificent optics and fast autofocus, but lacks the faster f/1.4 speed, 9-blade diaphragm and image stabilization of this new lens. The 85mm f/1.2 L II is optimized for astronomy and similarly crazy tasks; it's not for general photography. The f/1.
Bokeh Fringing / Longitudinal Chromatic Aberrations (LoCA) As mentioned in the introduction, Canon uses a "BR" element to reduce axial chromatic aberrations in the EF 35mm f/1.4 USM L II. Bokeh fringing effects are normally a largely unresolved issue - also because they are very difficult to remove during post processing. EF35mm f/1.4L II USM. 将具备异常色散特性、能大幅折射蓝色光（短波长光）的BR光学元件与一组凸、凹透镜组合，构成复合镜片，也就是BR镜片。. BR镜片能够很好地补偿色像差，原来大光圈镜头较难补偿的色像差可以得到更理想的校正效果。. 除新开发的BR镜片外，还 by4WkO2.
