GX7 vs E-M1 IQ difference?

Started Dec 17, 2013 | Discussions thread
GEagle Junior Member • Posts: 41
Re: Image Quality Stops

Baron LaCat wrote:

Jorginho wrote:

and it’s only -1/3 of a stop in overall image quality behind the 16-Mpix Sony NEX-6.

This STOP jargon really confuses me !!! How is image quality measured in Stops ???

And when folk talk about Stopping Down (with a lens) what do they mean ?

(I almost grasped the idea of Stopping Down on a lens, and now we talk about IQ measured in Stops)!!

And if we can Stop Down on a lens, can we also Stop Up on the lens ??

Thanks in advance


In this context, it usually means ISO-wise - like, 1 stop means that, from a IQ point of view (noise etc.) results at ISO 3200 on a camera are comparable to results at ISO 6400 on another.

A very good book to better understand the exposure triangle comprising aperture, shutter speed and ISO is, IMHO, Bryan Peterson's Understanding Exposure.

Hope that helps,


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