Leica 25mm f/1.4 - Pictorial Review

Started Apr 18, 2013 | Discussions thread
clengman Senior Member • Posts: 1,964
Re: Guess what?

David Kieltyka wrote:

Pretty much every 50mm f/2 lens made between the early 1970s and the development of affordable aspherical element manufacturing techniques used the same double-gauss optical design. Each maker tweaked it a bit and maybe gave it a different name (Zeiss "Planar" or Leitz "Summicron"), or no name at all, but they were all close variants of each other.

The same thing is happening with today's computer-driven designs. They're converging due to different companies using the same, or very similar, design algorithms.

Then who cares if it's a Leica design or not? Everyone plugs the same numbers into the same algorithm and gets the same lens design? That's your argument?

It seems to me though that designs are diverging not converging. Once you're able to make really funky lenses relatively cheaply, there are far more feasible design possibilities, not fewer.

I think this sentence in the Sigma link you provided is crucial: "My guess is that Sigma may want to release a much cheaper alternative of the excellent Panasonic Leica 25mm f/1.4 lens." But that doesn't mean the Sigma is an intentional copy of the Pana/Leica design...or vice versa.


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