X-T1 looks mighty interesting, what do you think?

Started Jan 28, 2014 | Discussions thread
ilsiu Regular Member • Posts: 474
Re: size/weight is what counts with m4/3

rovingtim wrote:


True equivalence does not exist;

Yeah it does. Equivalence answers this question: if I want the same image in terms of angle of view, depth of field, noise using the same shutter speed from two camera systems, what are the settings required?

By extension equivalence answers this question: are there any settings in one system impossible to duplicate in the other?

I'm not sure how to get all 4 (angle of view, depth of field, noise/ISO, shutter speed) simultaneously equivalent.

If I have on FF (I chose FF instead of APS-C because the conversion math is easier):

Focal length (angle of view): 24mm

Aperture (DOF): f5.6

ISO (noise): 400

Shutter speed: 1/250

Then here are all the different combination that can be done on mFT. There's only one combination that is equivalent for all 4 parameters, but then mFT is overexposed by 2 stops relative to FF.

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