There is no such thing as “full frame equivalent aperture”. The only thing that changes when using a lens in a smaller than full frame sensor is crop. It’s the same light, its the same aperture, just cropped.
People talk about “aperture equivalence” because to get the same perspective on a cropped sensor, you’ll need a wider focal length, and longer focal lenghts will have a shallower depth of field when compared to wider focal lenghts at the same distance. It’s convoluted and dumb.
For any given focal length, the aperture is the same on all cameras, the same light goes in, the depth of field at a given distance is the same. A 50 f1.8 is always a 50 f1.8.
And none of that has any bearing on ISO or the sensor’s performance.
There is no such thing as “full frame equivalent aperture”. The only thing that changes when using a lens in a smaller than full frame sensor is crop. It’s the same light, its the same aperture, just cropped.
People talk about “aperture equivalence” because to get the same perspective on a cropped sensor, you’ll need a wider focal length, and longer focal lenghts will have a shallower depth of field when compared to wider focal lenghts at the same distance. It’s convoluted and dumb.
For any given focal length, the aperture is the same on all cameras, the same light goes in, the depth of field at a given distance is the same. A 50 f1.8 is always a 50 f1.8.
And none of that has any bearing on ISO or the sensor’s performance.