When you look at this lens mounted on the A7 it's really not all that big and it handles well, balance wise. However, if you look closely the adapter needed is the same size as this tiny lens and actually doubles the size as a whole. This is one drawback of using legacy lenses on these cameras. The rangefinder lenses are much better in this respect as the adapter is actually quite small and you hardly notice it's there. The size is then reduced and it handles better than the SLR lenses. There are some very good lenses in the SLR arsenal but when you start to put some long lenses on these cameras with the adapter attached then they really become rather long and at low shutter speeds, the problem of shutter shock becomes a real problem; especially with the A7R.