Quote:#1 complaint with sony is godawful construction of their equipment and no sense of how to do anything, really.
E.g FE lenses, $1200/ea, focus cam is glued to the motor, which is exposed to more force than any other part of the lens, instead of using a latching system, screw, or other piece... constant focus failures. OS is the same way. The barrels are finished nicely on the outside and the rings generally feel good, but the lenses that aren't Zeiss badged are very, very plasticy inside and the Zeiss badged ones are merely below average.
FWIW Fuji is the same way. As are panasonic and olympus. Attractive finish, bad internals.
Interesting SLR Magic is perhaps worthy of a "fastest improving" award there, but canon still has the cleanest mechanical engineering in their lenses by a country mile (and tied for best reliability, too).
Well, I can only comment from the optical impact.
The full format FE lenses seem to be well centered (so far at least). The APS-C ones are often a disaster.
Pana is soso but usually not totally off.
Oly was superb during the FT times but has deteriorated with MFT
Canon - was bad, now very good.
Sigma - was terrible, now good.
Tamron - soso, sometimes on the bad side
Tokina - OMG (we gave up here essentially)
Nikon - generally good
Pentax - don't ask
Samsung - #$%^&(
Fuji - bleh