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That the max. extended ISO on the Fuji X-T2 has remained unchanged from that of the X-T1 (which is 2.5 years older) has gone unsaid in all of the current raves about this latest Fuji flagship. ISO 51,200 is not bad. It is the same as what I have on my Fuji X-E2s and I know that at that ISO, barring the noise, you can turn darkness into light.
That said, I have also noticed, and some quick Googling seems to bear this out, that Fuji ISO tends to be on the low side. I notice that I am invariably using 200 more ISO with Fuji than what I am normally accustomed to; i.e., setting 640 ISO on a Fuji when I would normally use 400, and 1,000 when I might have settled for 800. I still find that Fuji, both my X-E2s and the rented X-T1, invariably underexposes too — though I know that I prefer brighter exposure to that of darker. So I am also continually shooting with E/V set +1/3 or +2/3 higher.
The Nikon D500 numbers are obscene. That is a full 32 x uptick! Barring noise that really would allow you so much latitude in terms of handheld shooting at night or at concerts.
So something else to think about.
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