Camera unit incorporating a printer configured to print distorted images

A camera unit comprising:

• a display configured to display an image to be captured;
• an image sensor configured to digitally capture the displayed image;
• a card reader configured to read a removable data card carrying distortion information, the card reader including, a light source configured to emit light toward the data card, a data sensor configured to sense data representing the distortion information being carried by reflected light from the data card, and a translucent cover mounted defining recesses in which the light source and the other sensor are located;
• a printer configured to print a distorted image on print media, the distorted image being a version of the captured image which has been distorted in accordance with the distortion information, the printer including a replaceable print roll carrying both the print media and ink to be printed upon the print media;
• and
• a validation apparatus configured to validate the replaceable print roll and enable the printer to print the distorted image only subsequent to validation of the print roll.