I was looking for a comfortable backpack with a large storage capacity: reflex housing, objectives and especially 70-200 mm mounted on the housing. The Fastpack 350 fully meets my criteria and, best of all, offers many ancillary storage including a compartment for a laptop computer 17 ". All in a template" cabin baggage "needed to fly. The Fastpack 350 . perfect addition to my bag Vanguard Pampas 57 is perfect and excellent quality / price ratio but does not accept the couple casing / 70-200 In conclusion, I do not regret my personal choice: to leave the Fastpack 350 traveling and Vanguard Pampas 57 less loaded with ballads targets for the day.