Indeed, I can see the the Sigma's sharpness superiority with my 27" iMac.
Thanks for your blog. It is exceptional. Quite a test ground you have amico!
thank you for your comment, I am glad you enjoyed the blog!
As far as the test ground, I wish!
Last time I went there, I brought a few cameras with me to test and try (P7700, Sony Nex-7 with 19mm & 30mm Sigma lenses, Sigma DP1 & DP2 Merrill); I will be there again soon, I hope, and who knows which cameras I will bring this time!