Nikon Patents New Lens

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If it does happen, expect early 2024 but likely later. Once demand for 800 PF has calmed down. The key phase-fresnel "machine" will be freed to make the keystone lens element, which have to anneal for some months apparently.

Cost can be expected lower than that of the 800 S PF. With O.L. of 310-312mm a 600 f5.6S PF can be expected to weight less than 2kg
 
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Like to see a 600 PF (or 400 F/4.5 equivalent at 600mm FL) at F/5.6.

Wonder if Nikon will ever make PF/TC combinations? Would increase weight, size and cost.
 
The article itself says the majority of patents never make the light of day.
600mm divided by f5.6 requires a minimum front element diameter of 107.14mm.

1000mm divided by f8 requires 125mm.

Despite being relatively light weight these lenses like the 800 PF would be quite large and quite expensive.

A lens design does not go into production unless the manufacture thinks it can be made at a price which will make a profit and at a price that it thinks the buying a public will buy in reasonable numbers.

In a perfect world a 600 mm f5 .6 PF would cost around 85% of the price of the 800 f6.3 PF.

If a 600mm f5.6 enters production I would join the likely inevitable queue wanting to buy one.

Digressing slightly, for those still entirely DSLR - as ML viewfinders are several stops brighter in any reasonable light an f6.3 lens does not have the composition or manual focus issues it would on DSLR's.
 
Some patents are never intended for production . Their existence is to block others from bring a product to market. I have no insight into Nikon's plans for their patents.
A patent like this will not keep others from bringing a product that is functionally the same to the market. What it does is protect their design from being copied and brought to the market.
 
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