I've been a long time user of LowePro bags of varying compartment counts. Recently, I've switched to using individual lens cases for each lens, "sliplocked" to my whichever main bag I drag with me on a given day.


Now that I've made this transition, I'm struck with a philosophical question that I'm sure is religious in nature with little concrete evidence to support either side: Should a lens be packed in the lens case with its mount downward or its cap downward?


My first instinct was cap-and-filter-and-hood down, for stability purposes. Then I began to consider the implications of dropping the case with the lens in it -- this suggested having the mount at the bottom might be better.


Thoughts? Anecdotes? Links to peer-reviewed scientific papers?