The truth about fast glass on m4/3

Started May 21, 2012 | Discussions thread
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topstuff
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The truth about fast glass on m4/3
May 21, 2012

Can someone help me please? I am a bit confused.

I am not trolling, but looking to understand.

If I am shooting with a 24-70 f2.8 lens on , say, a 5D2, what would the equivalent lens be on m4/3?

Sure, focal length would be 12-35 ( like the new announcement from Panasonic) but am I right in thinking that the max aperture would have to be , say, F1.8 or thereabouts to have the same effective light gathering as a f2.8 on FF?

In other words, what is F2.8 in M4/3, when translated into FF or even APSC?

A friend was telling me that their Oly 45mm F.18 was equivalent to a 90mm F1.8 in FF. I am not sure this is right.

Can someone enlighten me with the facts?

Thanks

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