Nikon Nikkor 600mm f/5.6 PF lens rumors: coming this summer?

Nikon 600mm f/5.6 lens patent

Slow news day, I will post a few random rumors from the Web today. The first one is about the Nikkor 600mm f/5.6 PF lens rumored to be announced this summer:

“I met up with an NPS member today to lay hands on his 500PF. He had it on a D5, so it was quite back heavy. But I liked the weight and it’s clear that it would be better in tough conditions than the 500FL. When I told him I intended to stop on my way home and order one, he told me he had it on good authority that Nikon would be releasing the 600PF this summer.”

Source: Dpreview