Is the Fujifilm GF 35-70mm f/4.5-5.6 WR or the Fujifilm GF 63mm f/2.8 a demonstrably better lens for landscape use, for focus stacking in particular?
By ruling out deviations in sharpness from focus position and field curvature and focus shift, a 20-frame focus stack tells us both near to far and across the frame which lens delivers the best total result. This study is persuasive.
Focus Stacking Shootout: Fujifilm GF 35-70mm f/4.5-5.6 vs Fujifilm GF 63mm f/2.8: Backyard Deck
Includes images at up to full camera resolution, plus crops.
Performance of GF63/2.8 shown with and without distortion correction for its barrel distortion.
f9 @ 0.8 sec focus stack 20 frames, ISO 100; 2022-03-08 18:00:57[low-res image for bot]
Fujifilm GFX100S + Fujifilm GF 35-70mm f/4.5-5.6 WR @ 50.6mm equiv (61.8mm)
RAW: Enhance Details, vignetting corrected, push 0.5 stops, +10 Dehaze, +10 Clarity, diffraction mitigating sharpening