What is resolution or dpi and which dpi should I choose?
DPI means dots per inch, and you should always select the highest dpi that works for that particular media for slide scanning. Specific to slides, our experience has shown that the maximum dpi you should use is 3000dpi. If you go higher than 3000 dpi, the resolution becomes too fine tuned and you start to see the microscopic permutations on the slide.