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Full-framer logic

Started Apr 25, 2017 | Discussions thread
(unknown member) Veteran Member • Posts: 7,274
Re: Full-framer logic
2

tkbslc wrote:

So let me get this straight, 2 stops is super important at the sensor, but irrelevant in the lenses?

Yes. The FF logic is often great. But it seems not to stop on FF, it can be on the 4/3" as well.

The one of the newer threads about the E-M1 Mk2 reviews by the professional wildlife photographer saying how E-M1 was so bad in noise that ISO 400 was the limit, but with the Mk2 she could use ISO 3200.... That is 3 stop difference! And then people started again questioning how can she (or generally) get the 4/3" "2-stop advantage in light gathering for the DOF" etc when the sensor is smaller...

But that just shows again how the ISO is personal measurement based to output and not scientific, why equivalence theory doesn't hold up as the difference can be very well 3-5 stops or just 1 stop or no difference. All depending from so many factors that claim "2 stop difference" is nothing else than bold claiming at the best.

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