Canon’s new 600mm and 800mm lenses

Started 3 months ago | Discussions thread
martinhb Regular Member • Posts: 400
Re: Canon’s new 600mm and 800mm lenses

Here's an introductory article about dual layer diffractive optics from Canon :

https://cpn.canon-europe.com/content/education/infobank/lenses/multi_layer_diffractive_optical_element.do

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