>>3567185>Would you say if you shot with the same lens on a 5D classic and shot on a 5D Mk iv would the results be the same? No because there were read noise improvements made during that time period, and photon shot noise is going to be the same between two FF sensors.
>If I took that same full frame lens and put it on a modern Fujifilm or modern Sony Apsc or on a EM5 would they lose out to the 5D classic at sayyy iso 3200?The read noise improvements mean aps-c would pull even if not be a little better. Again, the 5D didn't even have gapless microlenses. As for the EM5 mark II, well...pic related. The photon shot noise difference is too great to overcome.
Now if you speed boosted the lens...which means FOCUS ALL THE LIGHT ONTO THE SMALLER SENSOR...then even the EM5 would pull ahead. Again: FF lenses collect more light, FF sensors capture more light.
