1. Observational techniques meeting #2

2. Good use for diffraction: exoplanets

4. Chromatic aberration

5. Spherical aberration Parabolic Spherical

6. Coma

7. Astigmatism (e.g., Hale telescope)

8. Field curvature (e.g., Oschin Schmidt telescope)

9. Distortion BarrelPincushion Keck NIRC

10. Reflection and transmission

11. Telescopes Galilean (refracting) 40” refractor at Yerkes Obs.

12. Telescopes: newtonean

13. Telescopes: Cassgrain

14. Telescopes: Cassegrain Ritchey-Cretien: Wise, HST, VLT …

15. Interlude: mounts Equatorial Alt-az

16. Telescopes: Coude Naysmith Coude

17. Telescopes: prime focus

18. Telescopes: Schmidt Schmidt Cassegrain Schmidt (e.g., PTF) Maksutov

19. End