(in Simplified Chinese)
The reviewer writes that he is rather disappointed about the IQ and usability of this expensive lens of Pentax. Purple fringing is obvious, stopping down is the only mean for better resolution, but then at f/8 using a lens with this long focal is actually impractical and rather difficult to use. The author also writes that this focal is indeed odd and not so useful. AF of this lens is fast enough, though, but the author doesn't think that good AF is meaningful when the IQ and usability of the lens is low.
DA560 Lens Review Published at PF
Tuesday, May 14, 2013