Software Architect/Project Manager for a French IT company, I built some nice software tools, like a Prolog Object language, based on Smalltalk. After years spent in playing as an amateur with Number Theory (I own the biggest Wagstaff PRP, I verified the seven biggest known Mersenne primes, and I have a nice conjecture about a new primality test for Mersenne numbers), I'm back to photography. My favourite is the portrait: capture rare look and expression. As tools, for now I only use Lightroom ; I like to have constraints and limitations ; also, I can do nearly exactly what I was able to do in B&W 30 years ago, and I get the same pleasure. Some time, I'll have to explore other tools.