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How to stow the EF 400mm f/4 DO IS USM in its case

Using the Infinity Compensation Mark on the EF 400mm f/4 DO IS USM lens

Setting the Focus Mode on the EF 400mm f/4 DO IS USM lens

Instructions for setting the Focus Mode on the EF 400mm f/4 DO IS USM lens

Cameras and Lenses Compatible with the Digital Lens Optimizer feature (Digital Photo Professional Ver.3.14.40) (EOS 7D Mark II)

EF 400mm f/2.8L IS II USM EF 400mm f/4 DO IS USM EF 400mm f/5.6L USM

Compatible Cameras and Lenses for the Function of Correcting Lens Aberration with Digital Photo Professional Ver.3.12.40 (EOS M)

EF 400mm f/5.6L USM EF 400mm f/4 DO IS USM EF 500mm f/4L IS USM

Using Extenders (Sold Separately) with the EF 400mm f/4 DO IS USM lens

Extenders Attach the extender to the lens, and then attach the camera. To remove it, reverse the order. Errors may occur if you attach the extender to the camera first.

Using the Image Stabilizer on the EF 400mm f/4 DO IS USM lens

Tips on Using the Image Stabilizer Set the STABILIZER switch to OFF when you are taking pictures using the Bulb setting (long exposures). If the STABILIZER switch is set to ON, the image stabilizer function may introduce errors .