ch. 1. What is photography? -- ch. 2. What is light? -- ch. 3. The camera : an introduction -- ch. 4. Images : what is perspective? -- ch. 5. Why does a camera need a lens? -- ch. 6. Elementary optics : how do lenses work? -- ch. 7. The simple thin lens and what it does -- ch. 8. How to make lenses that are good enough for photography -- ch. 9. Coming to terms with real camera lenses -- ch. 10. Fisheye lenses and how they capture the whole sky -- ch. 11. What is an equivalent image? -- ch. 12. How to get very high magnification -- ch. 13. Do we need filters anymore? -- ch. 14. The limits of human vision -- ch. 15. How can color be managed? -- ch. 16. Image capture and processing -- ch. 17. What is perceived image quality? -- ch. 18. The creation and appreciation of art in photography.