It is a comparison between a Fresnel element (on the left) and a traditional element (on the right) of the same optical power. A diagram below shows you the biggest asset of Fresnel elements. Fresnel elements are well known and used in lighthouses or continuous lighting and allow you to construct very small optical instruments, especially when compared to their effective focal length. Nikon, contrary to Canon which have already had DO (Diffractive Optics) devices in their line-up, don’t say anything about diffractive technology but a Fresnel element (PF- Phase Fresnel – abbreviation in the name of the lens). In January 2015 Nikon showed the Nikkor AF-S 300 mm f/4E PF ED VR, an instrument based not on lenses or mirrors but a complete new technology, at least when it comes to that segment. You can change your consents to the use of cookies at any given time. In this document you can find more information concerning browser settings and the way we and our social network, advertising and analytics partners process your data. If you fail to do so you should be aware that we are going to process your data according to our Privacy Policy. You can switch cookies off by adjusting your browser settings so if you donât agree with our cookie policy please, change your browser settings or leave our website. Our partners might combine information, obtained on this site, with other data they get from you as you make use of their services while surfing the internet. Information about your browsing habits is shared with our social network, advertising and analytics partners. As in the case of almost all other websites, cookies help us to personalize ads, offering you the most relevant information, allow you to share pages with social networks, make our services work as you expect and, overall, help us to monitor and improve our performance.
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