Originally posted by Medium FormatPro Well over the years; one has had the capability of adding Zeiss glass in the PK mount. As far as I can recollect, most of the Zeiss PK is also manual focus.
That is correct. The AF Zeiss lenses are for Sony.
Originally posted by Medium FormatPro Throughout recent history Pentax usually limits the size and weight of their lenses; and this bypasses a bit of the quality aspect.
OK, let me compare DA 35 Ltd to Zeiss ZK 35/2,
or DA 70 Ltd to Zeiss ZK 85/1.4,
based on my experience with these lenses.
The Pentax lenses are small and light
(both positive qualities in themselves,
but also facilitating the AF),
while the [MF] Zeiss lenses are faster.
As a consumer, I appreciate having had the choice.
Although the ZK lenses are no longer available,
which feeds in to the other point you make:
Originally posted by Medium FormatPro Pentax has really got to do a number of things... get . . . more incentive for more third party releases.