Thank you. I have found two examples of this Tamron by one of our local dealers and will try them shortly I hope. Very interesting lens with IF and fast AF as I see. Does it true that the focus point of this lens is shifting during the zooming? Does it true that the quality of this lens is very different from one example to another? Also what is the opinion about the Sigma 1.8/20 in comparison to Pentax 4.0/20-35? I also have found both lenses in our stores and I am in doubt about the optical quality. Thank you. Sincerely yours, Arthur Grokhovsky -----Original Message----- From: Bruce Dayton [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 23, 2005 11:22 PM To: Артур Гроховский Subject: Re: Opinions about Sigmas Hello Артур, You should consider the Tamron 28-75/2.8 DI lens. It is reasonable price and optically very good. I have it and am very pleased with it. I have heard that the Sigma offering in that range is not that good. Food for thought... -- Best regards, Bruce