Leica 25mm f/1.4 - Pictorial Review

Started Apr 18, 2013 | Discussions thread
clengman Senior Member • Posts: 1,964
Looks like a sigma lens to me.

Sigma Patent for 25mm f/1.4.

The above design was patented 6/16/2011. Two months or so before the panasonic 25mm was made available to the public.

Compare to the Panasonic design below:

They're the same.

pcb_dpr wrote:

What I've seen/heard, both in print and in conversations at photo shows, is that Leica/Zeiss do the lens designs, specify materials and quality control standards. Though no longer in production, Contax-branded Zeiss lenses were built by Zeiss employees in Kyocera's factory in Japan. They don't appear to be simply allowing their name to be stamped on others' product without any input/involvement.

I suppose you could maintain that everyone involved is lying, but I'd be interested if there were any real evidence to support this.

Chris Noble wrote:

DerpyWebber wrote:

Correct me if I'm wrong, but isn't the optical formula of Leica design?

Just as much as the lens on the Sony RX1 is a "Carl Zeiss" design.

They are just labels that the trademark owners sell to the highest bidder.

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