Fujifilm GF 35-70mm f/4.5-5.6 Distortion and Distortion Correction
The Fujifilm GF 35-70mm f/4.5-5.6 WR is a 2X zoom lens whose distortion characteristics are not documented by Fujifilm. This page shows how it actually behaves.
As is always the case with zooms, distortion varies from troublesome to near-zero.
Fujifilm GF 35-70mm f/4.5-5.6 Distortion and Distortion Correction @ 35mm, 47mm, 63mm, 70mm
Includes uncorrected and corrected examples, plus crops showing sharpness losses from distortion correction.

Fujifilm GFX100S + Fujifilm GF 35-70mm f/4.5-5.6 WR @ 28.8mm equiv (35mm)
RAW: vignetting corrected, +20 Whites, +10 Clarity
[low-res image for bot]