If you have ever tried to find a lens profile in the Lens Corrections panel for lenses for an Olympus, Sony, Fuji, or other mirrorless or compact camera, you know that there are none available. That said, you don’t have to create a custom lens profile. Photographs from these cameras are too distorted to use without corrections applied, so Lightroom applies these corrections automatically rather than giving you the choice of whether to apply them or not. If you are using Lightroom 6 or CC and you leave “Enable Profile Corrections” unchecked, you’ll see a message at the bottom of the Lens Corrections panel stating, “Built-in Lens Profile applied.” Note that this message will not appear if you check “Enable Profile Corrections” or if you are using a smart preview – nevertheless the built-in profile is still applied.
If you still see barrel or pincushion distortion or lens vignetting, which are issues that lens profiles are designed to fix, then you can go to the Manual tab and use the Distortion and Vignetting sliders to apply stronger corrections.