The iPhone 5 combines ease of use with excellent image quality that rivals the best of its conventional competition (ignoring the innovative Nokia 808 PureView for a moment). Anyone upgrading from the iPhone 4S will not see a huge difference in image quality, but the leap from earlier generation models is profound. The iPhone 5's camera is one of the best around, but manual control over white balance and exposure (via exposure compensation) would be the cherry on the cake.
Excellent resolution at low ISO sensitivity settings in good light; Reliable metering and white balance in daylight; Supremely easy to use Camera App; Hardware shutter button (volume keys); Bright, contrasty, very high-resolution LCD screen; Excellent built-in HDR and Panorama modes; Effective touch-to-focus/AE and AF/AE lock options;
Luminance noise visible in areas of plain tone even at ISO 50; Lens prone to flare when bright lights are positioned at or just outside the edge of the frame; Face detection a little hyperactive (sometimes finds faces that aren't there); High ISO output (ISO 1250-3200) uses pixel-binning, which sacrifices resolution for sensitivity;