Canon lens/ Sony a7sii quirk

[Frank Kolwicz]

I tried a rental Sony a7sii on my EF600/4LIS(II) and 100-400L lenses and noted something funny: when I shut the Sony off and put the system on the seat next to me and started driving and alarming rattling came from the 600! Something in the lens was loose and road vibration made it rattle. Naturally, I stopped immediately and contemplated the situation. The Canon bodies I've owned never did that, so I put a 70d on the lens, turned it on then off and drove on - no rattle. Next I put the 100-400 on the Sony, turned it on then off and shook it - it rattled. Canon body on - no rattle!

Does the Canon system have a "parked" position for the lens internals that is missing when using the Sony? Does the rattle indicate possible damage might be done?

By the way, the Sony A7sii gave much superior low light image quality compared to a 7dii, with both higher ISO ability and higher shutter speed available, but with manual focus.

[Frank Kolwicz]

I a reply to my message LensRentals tells me that turning of the IS before turning off the camera may prevent this potential problem. I think it could be serious if the loose IS parts get banged around when they should be "parked".