Lensrentals tears down a Canon RF 100-500mm F4.7-7.1 lens to solve the mystery of a cracked element

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 [Lensrentals], you know how we pack