Canon PowerShot S1 IS PowerShot S1 IS Camera User Guide - Page 157

Managing Image Files (p. 110) About File and Folder Numbers Images are assigned file numbers from 0001 to 9900, and folders are assigned folder numbers from 100 to 998 (Folder numbers cannot contain 99 in the last two digits). DCIM 100 CANON 0001 0002 0099 0100 101 CANON 0101 0102 0199 0200 198 CANON 9801 9802 9899 9900 Folder numbers cannot contain 99 in the last two digits. 200 CANON 0001 0002 0099 0100 Folder File Capacity Each folder usually contains up to 100 images. However, since images shot in Continuous mode and Stitch Assist mode are always saved into the same folder, a folder may contain more than 100 images. The number of images may also exceed 100 if a folder contains images copied from a computer or images shot with other cameras. Please note, however, that the images in folders containing 2001 or more images cannot be played back in this camera. How to Adjust the Exposure (p. 78) This camera automatically adjusts the exposure to shoot images with the optimal brightness. However, recorded images may sometimes be brighter or darker than the actual image depending on the shooting conditions. If this happens, adjust the exposure compensation manually (p. 78). Underexposure The whole recorded image is dark, which makes white elements of the image appear gray. Shooting bright subjects or in backlit conditions may cause the image to be underexposed. Adjust the exposure compensation towards the + end. Optimal Exposure Appendix 155