Don't think you have accurately "summed up". From the article linked:
 "Excellent aberration control with very low amounts of purple fringing"
and
"Perfectly accurate autofocus, regardless of aperture, when using
Contrast Detect AF (Live View)"
but using the viewfinder autofocus was inexplicably awful (at least on
the sample of lenses PF tested).
 I wonder if this is something that could potentially be fixed via
lens firmware?

The thing I like the least about sample images I have seen from this
lens is the bokeh. I do not agree with the review in the bokeh
department. I think this lens has weird bokeh.




On Mon, Nov 3, 2014 at 1:07 PM, Larry Colen <[email protected]> wrote:
> Pentax forums did a review of the 18-35:
>
> Skipping to the conclusion:
> http://www.pentaxforums.com/reviews/sigma-18-35mm-f18-dc-hsm-art/conclusion.html
>
> From the start:
> http://www.pentaxforums.com/reviews/sigma-18-35mm-f18-dc-hsm-art/introduction.html
>
> tl;dr:
> Amazing lens, incredible sharpness but nasty purple fringing and lousy
> autofocus performance.
>
> --
> Larry Colen  [email protected] (postbox on min4est)
>
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-- 
Life is too short to put up with bad bokeh.

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