Canon's release of 600/800mm f11 lenses PROVES you don't need Cannons!

Started 2 months ago | Discussions thread
Astrotripper Veteran Member • Posts: 8,251
Re: Moreover, they finally demonstrate where equivalence stops

Hubertus Bigend wrote:

Astrotripper wrote:

Canon’s DO is not the same thing as Nikon’s PF.

Canon's conventional, say, 300mm f/2.8 is not the same thing as Nikon's conventional 300mm f/2.8, either. The difference between Canon's DO and Nikon's PF designs is not so much more significant.

From what I read, the difference is fundamental. Canon's DO technology is based of diffraction (hence the name) while Nikon's PF on refraction with the use of fresnel lens (hence the name).

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