whitewolfowner wrote:
My son has the first generation Tamron 150-600 and loves it. I have used it and love it too. From what I have heard the Sigma sport is sharper but a lot heavier and Tamron's second generation lens is a lot better then the first one. We can see nothing wrong with the first generation (even though it seems that the quality of this lens does vary from lens to lens), so if you van get a get one of the first generation you get a steal for the price it's selling at now.