1. LIGHT, LENSES, AND OPTICS

2. What is colour? A sensation caused by light in our eyes

3. Cones and Rods

4. What is light? Particle? Wave? Rays We’ve got our best scientists on it

5. Light is a particle because… It has mass and momentum (REALLY SMALL) This is the “magic” behind photovoltaic panels http://www.youtube.com/watch?v=8gFwKytVw1o

6. Light is a wave because… 1800s – Thomas Young: Double-slit experiement

7. Light is a wave because… Electromagnetic radiation frequency

8. Light is a ray because… It’s behavior ALSO works like that of a ray. Reflection Refraction

9. What does this mean for photography? We get to talk physics in Mr. Levine’s class Photo-graphy – light drawings Control the light, control the image

10. Focal Length

11. Camera Lenses

12. Lens types Telephoto Wide- angle Zoom Prime lens Macro lens Fish-eye lens

13. Telephoto Long focal length Brings the subject closer Used for Sports Wildlife Focal length: 135 – 300mm

14. Telephoto – Mirror-telephoto

15. Wide-angle Short focal length that takes in a wide view Used for landscapes and interiors Focal length about 21 – 35 mm

16. Zoom Variable focal length

17. Prime lens Fixed lens Cannot change focal length Better in low-light More DOF control

18. Macro lens Some lenses have a macro mode as well

19. Fish-eye lens A warped perspective Magnify in center only

20. Lens accessories Extenders Extension tubes Close-up attachment Filters Lens hood

21. Extenders Multiplies the zoom/telephoto of a lens 100mm becomes 200mm w/ a 2x extender

22. Extension tubes Increase magnification in macro photography

23. Close- up attachments Magnifying glass attachment for lens.

24. Filters Filter out certain types of light Protects main lens Polarizer lens Gets rid of glare Only lets in light “waving” a certain way IR lens Filters out visible spectrum

25. Lens hood Used to prevent glare

26. Lens Maintenance Dust/particles – soft brush and air Oils – solvents and cleaning pads

27. Lens maintenance