Originally posted by x4rd I think I have been called to reply to this. Probably You haven't photographed any situation, when silent AF is needed, for example a wedding, theathre and cetera. Of course, You can have any screw drive lens You want but You don't change the fact that is ancient tech in terms of modern technology.
---------- Post added 01-29-19 at 03:43 PM ----------
You are comparing apples to oranges
I don't know how loud this lens might be, but a small, light, not too fast, modest wideangle is probably the least critical to excessive focus noise. The depth of field will cover a lot, the focus changes are small, the focussing group (probably) small and leightweight. Actually, this would be a good candidate for PLM or DC. I would not exclude this possibility, since the DA 20-40 does not show many signs of excessive size gain by incorporating it. But, true, the mechanical aperture makes it unlikely in this case.
However, this might be more of a seriously cheap kit lens with very solid IQ than a specialist lens for those quiet moments.