The
Sony Zeiss 16-70mm f/4 has a reputation for weak performance at 70mm,
and I am curious to see how it will stack up against the Sony DT
16-105mm which is not even at the far end of its focal range. The Sony
Zeiss 16-70mm f/4 is a lot better at f/4 than the Sony DT, which
doesn't play here, but on the other hand the same can be said for 105mm
where the Sony Zeiss has nothing.
100% center crops at 70mm
Corner
Now both at f/5.6
Corners
At f/8 the Sony DT 16-105 has surprisingly little improvement, which is
surprising considering its behavior at wider focal lengths.