Chapter 5: Imaging 5.1 Imaging Overview 5.2 Important Considerations for ACS Imaging 5.2.1 Optical Performance 5.2.2 CCD Throughput Comparison 5.2.3 Limiting Magnitudes 5.2.4 Signal-To-Noise Ratios 5.2.5 Saturation 5.2.6 Faint Horizontal Striping in WFC CCDs 5.3 Wide Field Optical CCD Imaging 5.3.1 Filter Set 5.4 High-Resolution Optical and UV Imaging 5.4.1 Filter Set 5.4.2 Multiple Electron Events 5.4.3 Red Leaks 5.5 Ultraviolet Imaging with the SBC 5.5.1 Filter Set 5.5.2 Red Leaks 5.5.3 SBC Imaging Filter Shifts 5.6 ACS Point Spread Functions 5.6.1 CCD Pixel Response Function 5.6.2 Model PSFs 5.6.3 Encircled Energy 5.6.4 Geometric Distortions 5.6.5 PSFs at Red Wavelengths and the UV 5.6.6 Residual Aberrations