Originally posted by FantasticMrFox It would hardly take a lot of time or resources to take a couple dozen of the more popular third party lenses out there and take five minutes per lens to make sure they work as they should. That's a job an intern can do in a day, or maybe a week if they want to be really thorough.
So Pentax should buy a couple of dozen lenses from it`s competitor just to make sure they work ok with their new design camera?!!! And maybe alter their carefully crafted design to accommodate a rival`s lens? Or perhaps alter the software to suite?
If Sigma want to sell lenses that work with a camera manufacturers equipment then there is no reason why they shouldn't, But it is up to them to keep pace, or at least catch up. Not the other way around!
I gave up buying independent lenses 40 years ago, And would never consider going back to one!
---------- Post added 05-11-16 at 04:51 PM ----------
Originally posted by stevebrot ...and the prize goes to ShiftR for coming up with the goods. Thumbs down to Pentax for cutting things a little close here. I suspect that clearance with some Pentax product might be a little tight as well.
Steve
I have just tried my 24-70,70-200 and 150-450 they all have 5mm clearances