I recently purchased a Lowepro Fastpack 250 for photography travel and I was really happy with it's use on a recent trip. I was wondering about if anyone has had any problems with the Fastpack 250 or 350 on longer lenses when attached to the camera for traveling on aircraft? I was concerned a little bit when I had a smaller lens for close-up shots in it and thought about "what if I get a longer lens like the Sigma 150-500mm or Canon 100-400mm and I need to travel with it?" I don't think changing lenses would be that much of a problem but may take longer to get a special shot while flying (changing from big to small lenses when the bag is under the seat and the flap open), but I had an idea of just packing them around clothing in my roll-on suitcase if needed.
I was just looking for something that is small, can fit my laptop, other things, and camera equipment in and is within the size range for both mainline and regional airlines' aircraft, and I found something that actually works that I am satisfied with.
If I want to get the 350 for larger and longer lenses, will that be compatible with the 1 carry-on and 1 personal item?
Anybody had this dillemma before or just packing it in your carry-on suitcase with your clothes as rpotection works for you?