Is Sigma 24 Art F/1.4 good for video filming ?
Storm footage clouds recorded using FPS Override option in Magic Lantern feature.
Dark sky - thunderclouds Cumulonimbus capillatus time lapse
This is sample of raw video of Sigma Art 24mm f 1.4 prime lens DG and Canon T3i aka 600D with Magic Lantern.
manual exposure: F/16 1/320 shutter ISO . First part recorded with 2 FPS and playback 25 FPS
Raw footage no color correction and any other post-production mechanism.