>>3591621Resolution needed to print an A2 size picture
To output an image properly it needs to have a certain minimum resolution. The number of pixels depends on the required output quality.
At 300 ppi (pixels per inch) the image needs to be 4960 x 7016 pixels. This is the required resolution for quality offset printing that will be viewed from a short distance (such as books, brochures, magazines, calendars,…). For photos it is also the optimum resolution but a somewhat lower pixel count (200 to 220 dpi) is acceptable for great looking photographs.
At 150 ppi the image needs to be 2480 x 3508 pixels. This is the minimum resolution for newspapers or posters viewed from a fairly short distance.
A digital camera with decent image quality and a resolution of 16 megapixel or more can be used to print high-quality A2 size pictures. Since such posters are usually viewed from a somewhat larger distance a 12 megapixel camera will still offer excellent quality and 8 megapixels will be considered good by many.
