What does "Retrieving Lens Data" Entail?

joshs10001

So this might sound like a silly question but what does "Retreiving Lense Data" mean essentially in terms of a render? I would like to know because I have found if the render ever gets hung up on this part then the render will essentially take so long that it isn't even worth trying to render in the first place. Thus what I would like to know what this portion of the rendering process means so that maybe I can fix it, does it have to do with the camera or is this some other thing that is talking about the models themselves, or does it have nothing to do with a lens and is instead something completely different?

 

From what I can tell with my limited experience it seems to only occur when objects or characters have more advanced textures that interact with the lighting but I'm not sure if that is the issue or if it is something else.

 

Any help that could be provided to better understand what is happening would be greatly appreciated, I've not seen any other posts about this kind of problem before.