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Why is the M4/3 mount so big

Started Jun 13, 2011 | Discussions thread
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Why is the M4/3 mount so big
Jun 13, 2011

When I look at the M4/3 mount, I wonder why it has such a large diameter. The new Leica 25mm f1.4 lens is mostly plastic, only the centre of the lens is glass.


The Panasonic 20mm f1.7 is an even better example of this:


Compare this to the Nikon 50mm f1.4. The glass fills the lens:


Why didn't they go with a smaller diameter mount which would have allowed smaller cameras to look more balanced than they do now:


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