What are the advantages/disadvantages of more pixels?
The advantage of more pixels is the ability to make larger prints, or to crop the image significantly and still make reasonable size prints. The disadvantage is that the digital files are larger and so you can store less of them in any given size camera memory. Images are usually stored as JPEG files. These are compressed files and a 3 megapixel image typically takes up about 1 megabyte of memory. So on a typical 32 Megabyte memory card you could store 96 1-megapixel images, 32 3-megapixel images or 16 6-megapixel images.
