150-600 tamron/sigma

Damn shame that Tamron or Sigma are not making a pentax fit in these lens,I guess it's down to demand,

Perhaps when Pentax full-frame comes around ?? One can hope

tamron/sigma have both said no

I'm sure that there would be circumstances where they both said yes, but in the meantime I'm rather looking forward more to the Pentax 150-450mm. That's long enough for my birding shots and if they weren't then the 560mm is there.

Actually, the price of that 560mm is looking pretty good at under £3000!

Thats a lot of money for the average Bloke when the other two are half that and probably just as good.

Next year 150-450 or 560 which to go for n two minds and one isn't even released yet

It depends how we define "just as good" though, and often buying the more expensive option can be cheaper in the long run. I've certainly found that to be so over the years, although to be fair sometimes it was constrained more by what I could afford at the time.

At the moment, both the 150-450mm and the 560mm are too expensive, but I'm always hopeful that at some point the opportunity will arise to buy one or the other. If I'm to stay serious about developing mu wildlife photography, it's the way forwards I see for myself anyway. I'm reluctant to go for the Sigma 50-500mm while there's some potential hope for the Pentax lens, although it would be a viable alternative.

I bought the Sigma 150-600mm sport for my 7D and it's a very nicely made lens. Only trouble is it weighs a ton and it's very average on anything that doesn't fill at least half the frame at 600mm.

It's going back to Amazon Tuesday and I will carry on waiting for the 150-450mm Pentax lens. Meanwhile I would take my 50-500mm Sigma over the 150-600mm any day.

Whether or not there are similar lenses in the Pentax range, this is still not good. Will they one day stop making ALL lenses in Pentax fitting..??

See this enlightening thread on the US forum for the Sigma perspective.

Having recently bought the sigma 50mm art lens it's sad that sigma won't make them lenses in Pentax mount as they are very very nice lenses and full of pixie dust magic.