Thank you for the response.
Originally posted by rparmar Using rare anecdotal cases of failures is no way of criticising a range as a whole, since none are perfect. And it seemed to me you were indeed resorting to this sort of criticism of the FA31 Limited.
In the absence of data like Lensrental repair statistics (they don't rent Pentax lenses),
reports of the kind I cited are one of the few sources of information on the failure modes of Limited lenses.
We have the same kind of dilemma dealing with SDM issues.
For studio use it may not matter.
As you pointed out, you can "just send back a bad copy."
But that is not an option under extended use out in the field,
or for lenses like the ZK range which are no longer in production.
Originally posted by rparmar Perhaps you are right. But I am not sure this makes any sense, given that a sensor with non-linear distribution of angled microsensors would have to be designed for a specific lens. It could never match a range of interchangeable lenses, as Fuji themselves declared in a white paper on release of the FinePix X100.
The match between sensor angle and incident ray angle doesn't have to be perfect,
but should at least be approximate.