The new Elinchrom ELB 500 TTL is the most powerful and portable TTL light ever designed for adventurous portrait photographers shooting both in studio and on location. Yesterday, Elinchrom introduced the ELB 500 TTL, an incredibly portable and powerful battery pack combining 500Ws of power with a feature set including TTL, High Speed Sync, Active Charging, Full Asymmetry with built-in…