Excerpt: This is my 5th original Pentax lens bought and the third one with focus problems. It seems that QC issues will always plaque this manufacturer. The lens suffers from serious backfocus issues. Focus lock can not be obtained at all at 24mm at infinity, Focus locks about 50% of the time at 12mm. So, back it goes.
Excerpt: Pop Photo (Apr-06) designated this lens the "Wide Winner" for its superb performance on objective tests. I agreed when first documenting home inventory, or picturing dark church interiors.<br /><br />But once in the field, I was appalled by the pronounced chromatic aberration ['purple fringing'] of trees or power lines outlined against an overcast sky.