To say nothing of the most important, and underlooked, feature on cameras: The coating.
Pentax SMC (Super Multi-Coat) is better than _any_ Japanese makers' coatings, period. They are on par, or only mildly behind, Zeiss T* coating (the defacto industry leader).
Glass reflects light. Lenses have many different elements, so if you've got 7 elements then that's 14 different surfaces all reflecting light and at least 12 of them are facing each other, meaning even MORE reflection.
More reflection, more washout and more flare. Less detail, less colour saturation, and less quality.
Pentax gets no respect anymore because in the '70s they opted to focus their "professional" appeal to medium format cameras, rather than 35mm stuff. The LX was the end of the line for them, and while Canon and Nikon poured effort and money into building support for professionals, Pentax let it languish and didn't bother with the guys who dealt with little cameras.
We see how well that worked out, eh?
Anyways, Pentax has always been the also-ran to most people, but they have a long and storied history of camera making, and are certainly not the also-rans in optical design and manufacture.
That said, nice pheasant tail.. Mine always look like ***.