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Many thanks 'Oldboy' though sorry to hear the views on my Sigma lens as I bought it on the strength of a Photoplus review which seemed to rate it quite highly for the money but never mind I am determined to get the better of it and intend to run a few test shots this weekend ( between decorating !! ).
I had heard that sometimes the camera and lens focus does not synchronize properly and was worried that this might be the case here. The 450D does not have the ability / technology to adjust this as other EOS cameras do and the whole lot needs sending away.
I am fairly sure the main reason for my problem is down to operator error fuelled by lack of knowledge and over eagerness to obtain the results that take people such as yourself (and Ed) lots of patience and practise to achieve.
Reading up on the subject helps immensely but benefitting from other peoples experiences also works wonders when they are kind enough to pass it on.
My thanks.
John
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