> Yes. With the 4-element Tamron 1.4X image iso not bad at center but > becomes noticeably softer at the very edges (on the D), while using > the Sigma 1.4X EX you get a very nice picture all over the frame > (noticeably better than the one with the Tamron even at center). > However, by using the Sigma converter you have to overexpose 1/3-1/2 > stop to get a proper exposure. I haven't tried 2X converters. Dario
Thanks Dario, the weather is improving here and I may just get out to try things at the weekend, it's dark by the time I get home from work so really limiting my opportunities. The combination with the 1.4 EX sounds great, I'll dial in some exposure compensation and see how it goes. Regards, John John Whittingham Technician "you can't be optimistic with a misty optic" ---------- Original Message ----------- From: "Dario Bonazza" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thu, 9 Mar 2006 09:04:36 +0100 Subject: Re: Sigma Lens - Was "which camera to buy?" > Yes. With the 4-element Tamron 1.4X image iso not bad at center but > becomes noticeably softer at the very edges (on the D), while using > the Sigma 1.4X EX you get a very nice picture all over the frame > (noticeably better than the one with the Tamron even at center). > However, by using the Sigma converter you have to overexpose 1/3-1/2 > stop to get a proper exposure. I haven't tried 2X converters. Dario > > ----- Original Message ----- > From: "John Whittingham" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Wednesday, March 08, 2006 7:59 PM > Subject: Re: Sigma Lens - Was "which camera to buy?" > > >> I own the 70-200/2.8 EX (not DG) and it's a gem. Both build quality > >> and optical performance are at the top. You can use it wide open at > >> 200mm with no worry (which was not the case with any other zoom lens > >> in this range I used before the Sigma). > > > > That's reasuring, I can vouch for the build quality, I can't wait to use > > it. > > I took a look at the sample images on your site several times. Have you > > tried > > it with either of the EX teleconverters? > > > > Regards, > > > > John > > > > John Whittingham > > > > Technician > > > > "you can't be optimistic with a misty optic" > > > > Message ------- > > -------------------------------------------------------------------------- -------------------------- > > > > The information transmitted is intended only for the person to whom it is > > addressed and may contain > > confidential and/or privileged material. If you have received an email in > > error please notify Carmel College > > on [EMAIL PROTECTED] then delete all copies of it from your systems. > > > > Although Carmel College scans incoming and outgoing emails and email > > attachments for viruses we cannot > > guarantee a communication to be free of all viruses nor accept any > > responsibility for viruses. > > > > Although Carmel College monitors incoming and outgoing emails for > > inappropriate content, the college cannot > > be held responsible for the views or expressions of the author. > > The views expressed may not necessarily be those of Carmel College and > > Carmel College cannot be held > > responsible for any loss or injury resulting from the contents of a > > message. > > > > -------------------------------------------------------------------------- -------------------------- > > ------- End of Original Message ------- ---------------------------------------------------------------------------------------------------- The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you have received an email in error please notify Carmel College on [EMAIL PROTECTED] then delete all copies of it from your systems. Although Carmel College scans incoming and outgoing emails and email attachments for viruses we cannot guarantee a communication to be free of all viruses nor accept any responsibility for viruses. Although Carmel College monitors incoming and outgoing emails for inappropriate content, the college cannot be held responsible for the views or expressions of the author. The views expressed may not necessarily be those of Carmel College and Carmel College cannot be held responsible for any loss or injury resulting from the contents of a message. ----------------------------------------------------------------------------------------------------
