Dear All,Thinking of buying the pentax 80- 200 f2.8 for my Pentax ist D. But I am concerned about the power focus. I have a 28 -105 power zoom which does not work on ist D is this the same for 80-200 f2.8. Would it be better to buy the sigma lens ?
Any advice would be greatly appreciated. Regards Charles WilsonSydney Australia
