The short answer is that your files should be at least 250dpi at the size they are being printed. A 6 megapixel camera shoots an image that is approximately 2000x3000 pixels. As you can see below this is enough quality to print anything from an 8x10 to 16x20, depending on the quality of the original image.
|
Print Size
|
Normal Resolution at 250dpi
|
Minimum Recommended Resolution
|
|
4x6
|
1000x1500
|
400x600
|
|
5x7
|
1250x1750
|
500x700
|
|
8x10
|
2000x2500
|
800x1000
|
|
8x12
|
2000x3000
|
1400x2100
|
|
11x14
|
2750x3500
|
1100x1400
|
|
16x20
|
4000x5000
|
2400x3000
|
|
20x24
|
5000x6000
|
2600x3120
|
|
24x30
|
6000x7500
|
3100x3875
|