1. If you crop the 20mm Sigma / 21mm voigtlander to match the field of view of the 24mm Sony GM, they have the same levels of choma more or less. Karafuru's gear list: Sony a7 II Sony a6500 Sony Carl Zeiss Sonnar T* E 24mm F1.8 ZA Sony E 50mm F1.8 OSS Sony Vario-Tessar T* E 16-70mm F4 ZA OSS +5 more.
4mdm.