I have the Promaster version of Donalds bag. I carry 2 bodies a 70-200 2.8, the 50mm 2.8, 18-125mm 3.5-5.6, a 2x extension, film and all the little ditties including releases and a 20gig portable HD and I have room to spare. With the Bogan tripod and monopod attached it wieghed in at 32lbs (including all my other carry-on crap) when I went on vacation last month. The advantage to the Promaster version compared to the LowPro is it cost $80. The only thing it is missing is the additional padding on the waist strap. I lugged that thing all over Progresso and Freeport and I never even got winded. My shoulders only hurt at the airport from putting it on then off then on then off then on.... Fits in the overhead compartment too. Magick Michael