At what DPI should I scan photos?

Related questions

1. Is pdf better quality than JPEG?
2. Is a PDF file smaller than JPEG?
3. What image file type is best quality?
4. Which file is bigger PDF or JPEG?
5. How do I increase the dpi of an image in paint?
6. Can PDF files be saved as JPEG?
7. Can I save a PDF as a JPEG?
8. How can I tell the DPI of a PNG?

Tags

1. #bigger
2. #resolution
3. #higher
4. #takes
5. #prints
6. #beyond
7. #files
8. #image
9. #photo
10. #details
11. #hidden
12. #scanning
13. #additional
14. #giving
15. #without
16. #wasteful
17. #general
18. #detail