Camera focal length animation not importing
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Description

System Information
MacOS 10.13.3

Blender Version
Broken: 2.79 5bd8ac9

Short description of error

When importing camera in FBX or ABC file (exported from Nuke), the animation of focal length is not importing. It's being set to a constant value according to frame 1. Other values are imported correctly.
If I reimport to Nuke, the focal length is correctly animated.

Camera files attached.

Details

Type
To Do

I cannot speak for FBX files, but in the case of Alembic files this is not a bug, but a limitation of the current implementation (however I used to work on a patch for supporting such features D2324).

I can confirm that is a known limitation for FBX.

https://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Import-Export/Autodesk_FBX
According to documentation, Focal length is not supported, yet.

It is not the first time that feature request is made to be able to work with Nuke.
I let @Bastien Montagne (mont29) close this report or attach it to a duplicate.

Implemented import & export of camera focal length in FBX now, so will re-assign to @Sybren A. Stüvel (sybren) for the Alembic part of it…

Sergey Sharybin (sergey) triaged this task as Normal priority.Mar 6 2018, 4:00 PM

Not sure why, but focal length keying worked for me in Blender Version 2.79 (2.79 2017-09-11, Blender Foundation), but does not work in Version 2.79b (2.79b 2018-03-22, Blender Foundation).

I've attached the FBX i'm testing with.