Originally posted by thibs Ah, some want to convert aperture to FF equivalent, now we need to convert ISO ?
ROTFLMAO
Well yes. Because for one reason, camera manufacturers do not standardise ISO to some universal specific light gathering bucket, only to the size of their own bucket, or, used sensor size. And 99.9% of people do not know that.
So they read, some APS-C camera has max of ISO 51K, and then they compare that 51K with 645Z 204K and think their APS-C isn't that bad. And they draw a totally wrong conclusion.
Or, they see some FF has max ISO of 300K, and they think that FF surpasses the 645Z. Again, wrong conclusion.
So yes, the apertures and ISO should be standardised by using the same denominator. So people would know that they are
not buying a f2.8 lens in a pocket camera.