Originally posted by matt_not_andrew A conspiracy theorist would suggest that Pentax and Tamron do have an agreement over lenses. For example, the 18 - 270 Tamron isn't available in Pentax mount but is available rebadged as a Pentax lens (possibly with Pentax coatings) for almost 50% more than the other system versions cost.
Well, at one point there was the Tamron 28-105 AF, of wobbly front barrel fame, and Pentax resold it as well - although I'm not sure if the two were actually manufactured simultaneously. Perhaps the Tamron designer defected to Pentax to produce the Pentax version, and then developed the equally-wobbly 16-45mm. I can't think of other examples; someone will undoubtedly come along with information if any exist. But it's definitely damaging Pentax to not encourage a more thriving 3rd party market. First Tokina was gone, then (apparently) Tamron, and of course Sigma is only a limited participant.
---------- Post added 04-20-2014 at 03:43 PM ----------
Originally posted by JohnX You never know. Third party lens producers do seem to be waking up to Pentax's resurgence.
On a lens choice note, have you considered Pentax lenses? The DA* 50-135 is astounding!
Generally, it seems the shorter the zoom range the better the quality overall.
I'm not really seeing the trend you are with regard to 3rd party lens availability for Pentax. I'm actually seeing the opposite.
I'm sure that the 50-135, with non-broken SDM, is amazing, but it's in a different price category than the 70-200 or the new 16-300.