Canon EOS 80D Manual (en)

Registering DLO Lens Data to the Camera
DLO lens data for lenses available at the time of releasing the 
camera to the market are all registered to the camera. However, it 
will be necessary to download DLO lens data and register the data 
to the camera for lenses released to the market after the camera. 
  Download DLO lens data to the computer
If DLO lens data is not downloaded to the computer or not 
registered to the camera, the DLO icon on the registering screen 
appears as [
Click the name of the lens you want to register.
The DLO lens data is downloaded, and the icon changes to 
  Register DLO lens data to the camera
Click the [OK] button.
The DLO lens data is registered to the camera, and EU exits.
] appears the next time the register lens data window 
is displayed.
If you click the [Cancel] button when step 1 is completed, DLO 
lens data is only downloaded to the computer.
If update data is available on the server, an [
] icon is 
displayed. Click the name of the lens, download the update data 
to the computer, and then click the [OK] button to register the 
data to the camera.
To use this function, the EOS Lens Registration Tool (version 1.4.20 
or later) must be installed.
For a list of the [Register lens data] window functions, see 
Lens names displayed in the [Register lens data] window may be 
partially shortened depending on the lens type.
The EF 15mm f/2.8 Fisheye and EF 8-15mm f/4L USM Fisheye 
are not compatible with [Register lens data].