Telecentricity in Micro Four Thirds.

Started Oct 30, 2013 | Discussions thread
Tom Axford
Senior MemberPosts: 1,296
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Re: Thanks for the info ...
In reply to exdeejjjaaaa, Oct 30, 2013

exdeejjjaaaa wrote:

Tom Axford wrote:

Steve_ wrote:

And this is evident from the (extortionate for me) amount of purple fringing and distortion especially at the wide end of the zooms.

I'm not sure this isn't a product of how large and optically uncompromised the 4/3s zooms were. It's hard to correct a lens as fully when compactness and light weight are leading priorities.

I agree with you. I can't see how telecentricity is going to reduce distortion or chromatic aberration.

please read = http://blogs.zeiss.com/photo/en/wp-content/uploads/2011/12/en_CLB41_Nasse_LensNames_Distagon.pdf

Thanks for that link to an excellent article that starts off talking about the distagon and biogon lens designs, but then towards the end has a section that clearly explains the advantages of telecentric designs to digital imaging and consequently why Zeiss do not produce symmetric (highly non-telecentric) designs such as the biogon and hologon for digital cameras.

The article more-or-less confirms what I said about distortion. In fact, the partially telecentric distagon design suffers greater distortion than the non-telecentric biogon, but the distagon is much more suitable for digital sensors. This helps to explain why software correction of distortion has become very popular with digital camera manufacturers.

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