I have been trying to photograph some of my oil paintings, so that I can have the 5x4 transparencies scanned onto digital. I thought that, assuming everything was square and level, if I focused sharply on one part of the image, the rest would also be in sharp focus.? Evidently, this is not the case, - I'm getting scans back where the centre of the image is perfect but other areas, especially out towards the edges, are very blurred.
Any advice please, on how to cure this.?
Thanks.
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