Here at the Scanner Shop, you will find a great range of A4 scanners to choose from. As the name suggests a4 scanners have the ability to scan a4 sized paper. They can be used for scanning large photographs at home or business document of this size. With all of our a4 scanners you can set the resolution on either high or low. This depends on the quality you require the images to be. For things such as text documents low resolution is fine.