All three of these are indeed joint ventures between Pentax & Tokina.
The Tokina lenses tend to run more than the equivalent Pentax lenses.
Jim Couch
Chuck Norcutt wrote:
> I didn't know about the others but the Tokina 12-24 is reputed to be a
> joint development between Pentax and Tokina. After looking at the 16-45
> and 50-135 it's pretty clear they must be from Tokina too. The Tokinas
> do look much nicer but you can't buy a Pentax mount from Tokina.
>
> Chuck Norcutt
>
> C.H.Ling wrote:
>
>> My feel about their quality is based on some of the lenses I have sold for a
>> friend, he still owning lots of Pentax gears, he complain about the plastic
>> feel of the 16-45. The 50/1.4 and 135/2.8 doesn't look smart to my eyes.
>> Many of their zooms are from Tokina, the 16-45, 50-135/2.8, 12-24... Have a
>> look on the Tokina 50-135 and 12-24 you will see what I mean, may be you
>> will like the look of Pentax but the Tokina version look better to my eyes.
>>
>> C.H.Ling
>>
>> ----- Original Message -----
>> From: "Larry"
>>
>>
>>> The new zooms have been going through teething pains because they are
>>> the first to be produced in a brand new factory, suppliers not supplying
>>> what was promised, and being built at too fast a pace due to
>>> overwhelming demand. This, of course, is being corrected, and is not
>>> acceptable to Pentax.
>>>
>>> The zooms at PMA were mock-ups, so any opinion based on that is useless.
>>>
>>> Even so, hands-on judgement creeps in here in such non paid-off sites as
>>> Photozones:
>>>
>>> "The 50-135mm is a member of the professional grade DA* family and the
>>> build quality is on an accordingly high level thanks to quality
>>> materials and weather-sealing."
>>>
>>> Or the cheap kit zooms:
>>>
>>> "Despite the very low price tag the build quality of the lens is
>>> surprisingly decent. Naturally the outer construction is still based on
>>> lots of plastics but its quality is quite fine with relatively tight gap
>>> tolerances and there's even a metal mount."
>>>
>>> Your comment is the absolute first I've heard that they "look ugly",
>>> but, again, that's that beholder thing again.
>>>
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