Originally posted by mohb What could be weirder than your strange belief that APSC images MUST be taken with the same FOV and DOF as those taken with a 'full frame?
I'm honestly wondering why you think that's ^ the assertion.
Here, let me try to explain in a different way: If you move to FF from aps-c, will all your images automatically need to get 1.5x wider? Meaning, you will make no adjustments to FL's used, everything will just need to be wider now, because the sensor is bigger and that's just the way it's going to be from now on?
No?
Or will you perhaps frame much as you had before? Meaning, adjust FL accordingly - Instead of using that 50 or 55 for portraits. or setting your zoom at 50-55, you use 75mm - 85mm now, maybe.
There is no *must* there, no-one is forcing you to do that... it's just the way your habits call you, it's the groove you'll fall back into because you know
what gives you the best results compositionally, or you know what your subjects expect if they have a stake in the output.
That's framing. As for DOF, it's usually an aps-c Uber alles poster who insists that there's no real advantage to FF, because once you match the aps-c DOF (by stopping FF down,) you've given up the total light/DR/noise advantage -
as if that were paramount and a common need - matching the smaller format's deeper DOF. (spoiler: it's not.)
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