Those cheap lenses have HUGE manufacturing tolerances. If the product
itself and the production processes are designed properly, there should
be literally no way to "assembly done wrong". Call it "manufactural
foolproofing" if you like. In other words, "kit lenses" and "precision
assembly" are from different worlds.
What's about our "made in vietnam" friends? Either those lenses are not
foolproof in manufacturing (burn the production engineers) or there's
too weak quality control (burn the final quality controllers). Don't
blame the line workers - if there's something that CAN be done wrong,
they DO it wrong. Bring on the automated machinery and it will go even
worse. Been there, seen that.
BR, Margus
Graydon wrote:
That's the Vietnamese plant with the dire QA issues, no? It's not just
screwing things together, that's getting optical tolerances while
screwing things together.
I'm sure your right about the cost of straight-up assembly, but it's
pretty clear they've got issues with "assembly done right". A moulded
in flange is likely cheaper than attaching the metal flange correctly.
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