Nikon's Phase Fresnel (PF) lens explained - Nikon Rumors

The new 300mm f/4E PF ED VR (pre-order options) is the first Nikkor with Nikon’s Phase Fresnel (PF) lens – this is how they were able to get it so light (half the weight of the previous version) and small (as the rumors suggested). After last night’s announcement Nikon published a short article explaining the new lens […]

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