" W. Krasowski" <[EMAIL PROTECTED]> wrote: >From: "Shaun Canning" <[EMAIL PROTECTED]> >> The 1.7x AF adapters are great. I use one with a Tokina 300 f2.8 MF to >> give me a 510mm f4.5 as John Mustarde commented. It is a fantastic >> set-up. You should be able to pick up one of these adapters on e-bay for >> less than $100.00 USD (I think I paid $89 USD for mine). > >Thank you folks for your opinion! > >Shaun, >Is it fast while AF-ing? What about noise level? >It is important to me as I shoot birds mainly.
I've found the AF very fast (as long as you're using it with an 2.8 or so lens) - probably because the moving mass of the focusing elements is so low. I've shot mototsports with my Sigma 300/2.8 and the 1.7x AF converter and even on the old PZ-1p it was plenty fast enough. I have some shots at http://www.robertstech.com/mid-ohio.htm -- Mark Roberts Photography and writing www.robertstech.com
