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Micro 4/3 crop factor confusion

Digital Cameras & Equipment - www.cambridgeincolour.com
Hi

I have a Lumix G3 which is micro 4/3 and decided to try fitting my old 35mm kit Tamron 80/210 zoom lens to see the results. I bought a cheap and cheerful convertor and gave it a go.

Contrary to what I expected I found the image size exactly the same as my Lumix 45/200 lens at the same settings although 2 stops faster. I expected the magnification factor to kick in and for my old lens to be something like a 140/320?

Can anyone explain why this is.


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