Originally posted by vishalv I usually tend to ignore Amazon/eBay reviews cause they aren't very reliable,
Hello Vishal, welcome to the Forum!
Trashing a super-zoom, even a fairly good one like the DA 18-135mm isn't exactly a tough sell. They're all a bit squirrely somewhere, usually the extreme wide end and full rack. Maybe he got a bad one.
As far as the K-3 being any worse (or better) than the other 20+MP generation APS-C DSLR's with older or inexpensive glass, focusing problems, soft corners, etc? It's been predicted for years that the improved resolution (etc) of the 'next' era would show the limitations of old or cheap glass, the sensor would out-resolve the lens. Still subject to settings, processing differences, ISO, yada, yada. His problems matching lenses (in focusing) with bodies? Focus correction, everybody uses it. 30 year-old lenses are worn and perhaps a bit loose in critical fit. Live with it, don't blast Pentax when they've been providing a solution for years, along with the rest of the industry.
Same with 3rd party glass; I'll bet Nikon and Canon users have to fiddle with their Tamrons, too. Maybe more, maybe less
He's bummed and it's Pentax's fault.
jmo,
Ron