Travel photography advice
Ernestine Rose Powerpoint presentation
Freeform aspheric telescope with an external pupil
Freeform aspherics in telescope design
Five completely different methods of optical design
The evolution of a new high na broad spectrum catadioptric design
Ultra- broad spectrum color correction in optical design
thoughts about old age
Lens designs with extreme image quality features
Unusual mirror systems
The John Henry lens design challenge
A general lens design method, with a photographic lens example
Photos around the home
Ancient secret codes and wordplay in the bible
The Shakespeare diet
Free Will Discussion
Freeform aspherics in telescope design, #3
Freeform aspherics in telescope design, #2
Lens in a box
Some unusual telescope designs
