Why is FE 70-200 bigger and heavier than Canon's

Started Feb 13, 2014 | Discussions thread
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Erik Magnuson Forum Pro • Posts: 12,247
Re: Because you cannot defy physics + shallow mount

bigley Ling wrote:

Timbukto wrote:

Shallow mount is great and all for adapters, but that means for most lenses the extra chassis you remove from the body, ends up on each tele lens.

really?? can you verify this theory please.

Well, it's not 1:1 because you can tweak things a little (e.g. front of Canon lens is 215mm from focal plane while front of Sony is 193mm.) But for equivalent performance without going to exotic optics like diffractive optics, the size is going to be similar plus or minus a few optimizations.

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