I have never scanned slides before. We have a slide scanner. What do I need to know to scan slides? What resolution should they be? The final output will be a powerpoint presentation.
I would recommend scanning at the highest resolution that you can [usually something like 2400dpi]. You can reduce the size later.
I guess that, if you know the final size you need [i.e. the resolution of the video projector to be used with PowerPoint], you could simply match that.
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