Roger and Aaron are back at it again for Lensrentals, this time with a teardown of a Canon RF 100–500mm F4.7–7.1 lens with a little secret inside. As Roger tells it, Lensrentals has come across ‘several’ copies of Canon’s RF 100–500mm F4.7–7.1 lens with a cracked element inside. He believes this crack occurs during shipping, but notes that ‘if you’ve ever rented from…

Roger Cicala of Lensrentals noticed that multiple copies of the Canon RF 100-500mm f/4.5-7.1 returned to the warehouse with the same visible crack in an internal element. Why it kept happening was a mystery. Cicalas initial assumption was that it had to do with Canon’s change in the optical stabilization system, which no longer locks down like it did in previous lenses. If you shook an older…