08-09-2011, 02:45 PM
I bought the Tamron SP 10-24mm f3.5-4.5 and use it on Sony Alpha A580. I noticed that when I mount this lens to my A580, I cannot change the AF method from phase-detect to contrast AF. Doesn't this lens support contrast AF? or is my copy of this lens defective? I am also planning to buy the Tamron SP 70-300mm USD (for sony), and I am wondering if this lens, like the 10-24mm doesn't support contrast AF either.
Would appreciate information from anyone who has knowledge of or experience with these lenses...thanks.
Would appreciate information from anyone who has knowledge of or experience with these lenses...thanks.