[NT73]

Despite the fact it has to cover a larger sensor, the elements in the Sony lens aren’t obviously larger than those in the Olympus.

As I understand all light waves converge in the centre cross over and then spread out the back, on to the sensor.
I imagine the size of the glass doesn't make much difference when related to a sensor.

A zoom lens is different to a fixed lens, regarding the distance between front and back elements to the sensor. I hope