In article , Robert Coe
wrote:

: I didn't say that my ownership of four Sigma lenses says anything.
:
: No, you did imply that only personal ownership of a few Sigma
: lenses made you able to talk about their QA quality.

Unlike you, I talked only about the lenses that I've owned.

nothing wrong with that. what you fail to understand is that it's
statistically insignificant.

: *Any* claims on deaths due to traffic accidents, drug use or heart
: failure are also not first-hand experience. Are they therefore
: in any way less real, less valid or less reliable than a personal
: experience that's only shareable if you turn into a ghost and
: haunt people?

Those are based on actual statistics gathered (in most cases) by relatively
unbiased observers. The only source you quote is a lens rental company that is
known to have been in a dispute with Sigma over warranty repairs.

that's because they had so many broken sigma lenses.