singlet - 100000 trials: min time 16.13, max time 16.37, spread 1.51%
landscape lens - 80000 trials: min time 15.96, max time 16.05, spread 0.54%
Sasian triplet - 50000 trials: min time 15.89, max time 15.96, spread 0.44%
double gauss - 30000 trials: min time 15.05, max time 15.15, spread 0.68%
2 spherical mirrors (spheres) - 100000 trials: min time 15.80, max time 15.90, spread 0.66%
2 spherical mirrors (conics) - 100000 trials: min time 16.22, max time 16.46, spread 1.51%
paraboloid - 100000 trials: min time 16.50, max time 16.61, spread 0.68%
Cassegrain - 100000 trials: min time 16.20, max time 16.48, spread 1.70%
Ritchey-Chretien - 100000 trials: min time 16.30, max time 16.41, spread 0.68%
cell phone camera - 10000 trials: min time 15.21, max time 15.40, spread 1.25%
