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This thread is also to leave a positive feedback on Sigma UK for their great service.
The story goes like this. I bought my Sigma 1.4x TC last July, to use with my 120-300/2.8, and the results where horrible. They were VERY soft wide open, and there was a pronounced ghosting effect in the images, always on the right hand side of the subjects. I thought that I was just expecting too much from a zoom, but then when I saw results from the same combination I realised that there must be something really wrong with mine. So, a few weeks ago I started talking with Sigma UK on email (some guy called Ricky, replies on the same day) and I've been told to send the TC over.
I get a letter a few days later saying that they received the tc but that it was a grey product (which was a bit of a shock for me because it was from a UK seller) and that any work done would be chargeable, and that even checking it for me is a gesture of good will. Anyway I thanked them and said fine, just send me the bill. A week and a half later I received a parcel, and to my surprise it was my TC, nicely packaged, with a delivery note, stating in the work carried out section: "NO FAULT FOUND TO MANUFACTURERS STANDARD, reset, check & test, NO CHARGE".
I didn't do any thorough tests on the TC, but the ghosting effect that I was witnessing before I sent it is gone, and it looks quite sharp now, even wide open!
Don't know what they mean by "reset, check & test", but there is something they did that fixed this TC. Anyway, kudos to Sigma UK for a very fast turnaround, 2.5 weeks, with constant communication, and if they did a free job, then I'm a very happy customer indeed!
The story goes like this. I bought my Sigma 1.4x TC last July, to use with my 120-300/2.8, and the results where horrible. They were VERY soft wide open, and there was a pronounced ghosting effect in the images, always on the right hand side of the subjects. I thought that I was just expecting too much from a zoom, but then when I saw results from the same combination I realised that there must be something really wrong with mine. So, a few weeks ago I started talking with Sigma UK on email (some guy called Ricky, replies on the same day) and I've been told to send the TC over.
I get a letter a few days later saying that they received the tc but that it was a grey product (which was a bit of a shock for me because it was from a UK seller) and that any work done would be chargeable, and that even checking it for me is a gesture of good will. Anyway I thanked them and said fine, just send me the bill. A week and a half later I received a parcel, and to my surprise it was my TC, nicely packaged, with a delivery note, stating in the work carried out section: "NO FAULT FOUND TO MANUFACTURERS STANDARD, reset, check & test, NO CHARGE".
I didn't do any thorough tests on the TC, but the ghosting effect that I was witnessing before I sent it is gone, and it looks quite sharp now, even wide open!
Don't know what they mean by "reset, check & test", but there is something they did that fixed this TC. Anyway, kudos to Sigma UK for a very fast turnaround, 2.5 weeks, with constant communication, and if they did a free job, then I'm a very happy customer indeed!