WHAT ASPECT OF THE PROBLEM WAS MOST DIFFICULT?
Keeping the curvatures somewhat realistic and 
keeping the weight down.

WHAT INSIGHTS (IF ANY) DID YOU GAIN FROM WORKING ON THE PROBLEM?
This is the first time I've tried designing an all 
cemented lens. It empasizes the impact the air-glass 
interfaces has on the design.

ADDITIONAL COMMENTS:
I did not try using a DOE surface in the design. When 
I get some time I intend on investigating that.