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Nx 50-150 is it really F4.2

Started Apr 12, 2016 | Discussions thread
ttbek Veteran Member • Posts: 4,869
Re: Reader caution advised - outrageously high f equivalences discussed.

You and I, I believe, understand the ins and outs here.  We know the definition, we know it is f/2.8 and that it acts in some ways as a f/4.2 would on full frame.  For people first discovering that it acts as a 4.2 in those ways, it looks like a duck, it sounds like a duck, it is a duck.   I agree that there shouldn't be sides, but there are.  So do we want simply insist to people that this duck (in their eyes) is a swan (I think they'll still have doubts), or should we also explain why this swan looks like a duck?

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