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

Started 2 months ago | Discussions thread
Astrotripper Veteran Member • Posts: 8,253
Re: Moreover, they finally demonstrate where equivalence stops

Wu Jiaqiu wrote:

Adrian Harris wrote:

Yet reading in the Canon forum has given me the impression that the fresnel lens is causing some on sensor PDAF focusing issues. Is this true?

i shot jet aircraft for a few hours with a 300mm nikon pf fresnel lens, the af was superb on it

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

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