Originally posted by bdery I tested the 20-40 and own the 16-85. The former is smaller, lighter, has a nice feel to it. Its IQ appears excellent. However, I found its range was much too short for my use. I don't believe it's meant to replace the 16-85, it's meant to replace (with some compromises) the limited primes.
I would rather say "complement" than "replace".
While I don't own the DA 21 or the DA 40 Ltd,
I do have experience of the DA 35 Ltd and DA 40 XS.
The rendering of the DA 20-40 is different
from the rendering of those two lenses.
Also, the DA 20-40, small as it is for a zoom,
is not a pancake like the DA 21 or DA 40,
so it attracts more attention from subjects
than a pancake lens would do.
It's a trade-off between stealth and convenience.