I just notice that my EFs 10-22mm cannot produce sharp spike as my EF28-70.
Why this happen? i'm not talking how many spike it produce. but the edge of the spike.
Take a look on the test photo
EF28-70 @ 28mm & F16
The spike is nice and long. with sharp end point.
EFs 10-22 @ 22mm & F16
The spike is short and the end is diverge out
Even closing aperture down to F29 still cannot get result as EF28-70.
Can anyone explain this?
Or my method is wrong?