>>2943459>sealing is about putting an o-ring or forty where it is neededFixed.
And you have to make sure all those rings are kept squeezed between plastic/metal parts, otherwise they won't work.
>You are no expert in economicsNo, but I just see that Pentax was sold two times in the last 10 years, had to shut down its Japan production plant, and half of its new lenses are re-housed Tokina/Tamron designs.
