f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
Mind you, you've said "exposure", and nothing about the blur. Please don't move the goal posts.
Read my first purple statement again please. It says 'exposure'!
Yes, you've said exposure, and I quoted you saying "exposure".
Here is your statement: "if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff to get the same exposure". Point is, you are over-defining exposure associating it with the particular aperture and shutter speed combination, saying "i would shoot exactly the same on ff".
On the other hand, you are also over-defining exposure by mentioning ISO, while ISO is not a part of the exposure - like "Volume" is not a part of original sound recording. ISO setting is applied after the shutter is closed and exposure is finished.
Please consider the definition of photographic exposure.
On a side note, the whole "same exposure" thing across different sensors and different sensor formats is a false goal, a misleading concept when it comes to noise and artifacts, clipping, etc.. It is the result that matters, and quite often the same result (or a better result) can be achieved at a different exposure.
If one wants to get the same result from m4/3 and FF, an example of settings will be 2 shots taken from the same distance, using:
on m4/3:
42.5mm (Panasonic) lens, 1/100 sec, f/1.7 (say, using ISO 200)
on FF:
85mm lens, 1/100 sec, f/3.4 (say, using ISO 800; or the same ISO 200 if shooting raw on an ISO-invariant camera and thus preserving more highlights, or maybe a different ISO setting strategy if using a dual-gain camera).
It is not the same exposure, exposures are 2 stops apart, but the resulting shots are very much the same. If you try it, you will have an empirical evidence it is true.
The parallel question is: if one is OK with DoF at f/2.8 on an FF camera, why not to use it and increase exposure, thus achieving less visible noise in shadows and overall better quality?
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list?
Bob is mostly talking nonsense.
Or you mostly don't understand him.
Nonsense is often hard to understand.
If it doesn't make sense to you it isn't necessarily make it nonsense.
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