New Olympus MFT 1.4 prime lenses?

Started 2 months ago | Discussions thread
rurikw Senior Member • Posts: 2,589
Re: New Olympus MFT 1.4 prime lenses?

bobn2 wrote:

glassoholic wrote:

bobn2 wrote:

rurikw wrote:

bobn2 wrote:

DLBlack wrote:

Vincent in Geneva wrote:

I can only rejoice at this news reporting Olympus patents for f1.4 lenses:

My wish list to make them unique in a crowded MFT lens market:

- much smaller/lighter than f1.2 series

Hopefully a little smaller and lighter. Much smaller and lighter is asking too much.

Why? The f/1.2 series is enormous.

1.4 is less than 1/2 stop less so how could they be much smaller?

By making them much simpler and sacrificing a bit of edge resolution. An f/1.4 double gauss design has intrinsically six elements. They get elaborated a bit to eight or nine. The Olympus f/1.2 has 17 elements, it is enormously complex for what it does. The result is edge to edge sharpness wide open, but the cases when you want edge to edge at f/1.2 (or f/1.4) are quite few, since unless you have a flat subject, and unless you put the main subject at the edge, DOF is miking the periphery blurred in any case at those f-numbers. So, I think that a simple, eight or nine element DG design at f/1.4 with good centre sharpness and edges that firm up after f/2.8 or so (which is when DG designs tend to get edge to edge) and was really rather small would be just great. Imagine the OM-1 50/1.4 made half size and you get an idea of what we're talking about.

Sounds good but the patent chart didn't look quite like that.

19 elements... not 17

Even more so, then.

I counted 13 elements on the patent chart. Looked awfully big and complicated but with those numbers it would be something in between.

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